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breathe-horizontal" role="navigation" aria-label="pagination"> <a href="" class="pagination-previous is-invisible">Previous </a> <a href="/search/?searchtype=author&query=Seshadri%2C+R&start=50" class="pagination-next" >Next </a> <ul class="pagination-list"> <li> <a href="/search/?searchtype=author&query=Seshadri%2C+R&start=0" class="pagination-link is-current" aria-label="Goto page 1">1 </a> </li> <li> <a href="/search/?searchtype=author&query=Seshadri%2C+R&start=50" class="pagination-link " aria-label="Page 2" aria-current="page">2 </a> </li> <li> <a href="/search/?searchtype=author&query=Seshadri%2C+R&start=100" class="pagination-link " aria-label="Page 3" aria-current="page">3 </a> </li> </ul> </nav> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2409.12689">arXiv:2409.12689</a> <span> [<a href="https://arxiv.org/pdf/2409.12689">pdf</a>, <a href="https://arxiv.org/format/2409.12689">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Statistical Mechanics">cond-mat.stat-mech</span> </div> </div> <p class="title is-5 mathjax"> Hysteresis Behind A Bottleneck With Location-Dependent Capacity </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Hammerl%2C+A">Alexander Hammerl</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Rasmussen%2C+T+K">Thomas Kj忙r Rasmussen</a>, <a href="/search/?searchtype=author&query=Nielsen%2C+O+A">Otto Anker Nielsen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2409.12689v1-abstract-short" style="display: inline;"> Macroscopic fundamental diagrams (MFDs) and related network traffic dynamics models have received both theoretical support and empirical validation with the emergence of new data collection technologies. However, the existence of well-defined MFD curves can only be expected for traffic networks with specific topologies and is subject to various disturbances, most importantly hysteresis phenomena.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.12689v1-abstract-full').style.display = 'inline'; document.getElementById('2409.12689v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.12689v1-abstract-full" style="display: none;"> Macroscopic fundamental diagrams (MFDs) and related network traffic dynamics models have received both theoretical support and empirical validation with the emergence of new data collection technologies. However, the existence of well-defined MFD curves can only be expected for traffic networks with specific topologies and is subject to various disturbances, most importantly hysteresis phenomena. This study aims to improve the understanding of hysteresis in Macroscopic Fundamental Diagrams and Network Exit Functions (NEFs) during rush hour conditions. We apply the LWR theory to a highway corridor featuring a location-dependent downstream bottleneck to identify a figure-eight hysteresis pattern, clockwise on the top and counter-clockwise on the bottom. We discuss why this general pattern is rare in practical scenarios, where a single clockwise loop is more typical. The paper discusses the impact of the road topology and demand parameters on the formation and intensity of hysteresis loops analytically. To substantiate these findings, we employ numerical simulations using the Cell Transmission Model (CTM). Our simulations show that even a slight reduction in the capacity of the homogeneous section can significantly decrease MFD hysteresis while maintaining outflow at the corridor's downstream end. These reductions can be achieved with minimal intervention through standard traffic control measures, such as dynamic speed limits or ramp metering. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.12689v1-abstract-full').style.display = 'none'; document.getElementById('2409.12689v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 September, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2408.06228">arXiv:2408.06228</a> <span> [<a href="https://arxiv.org/pdf/2408.06228">pdf</a>, <a href="https://arxiv.org/format/2408.06228">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Quantum Physics">quant-ph</span> </div> </div> <p class="title is-5 mathjax"> Response of the Quantum Ground State to a Parametric Drive </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ranjani Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2408.06228v1-abstract-short" style="display: inline;"> The phenomenon of Parametric Resonance (PR) is very well studied in classical systems with one of the textbook examples being the stabilization of a Kapitza's pendulum in the inverted configuration when the suspension point is oscillated vertically. One important aspect that distinguishes between classical PR and ordinary resonance is that in the former, if the initial energy of the system is at i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.06228v1-abstract-full').style.display = 'inline'; document.getElementById('2408.06228v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.06228v1-abstract-full" style="display: none;"> The phenomenon of Parametric Resonance (PR) is very well studied in classical systems with one of the textbook examples being the stabilization of a Kapitza's pendulum in the inverted configuration when the suspension point is oscillated vertically. One important aspect that distinguishes between classical PR and ordinary resonance is that in the former, if the initial energy of the system is at its minimum (${\dot x}={x}=0$), the system does not evolve. In a quantum system, however, even when the system is in the minimum energy (ground) state, the system has non-trivial evolution under PR due to the delocalized nature of the ground state wavefunction. Here we study the evolution of such a system which exhibits a purely quantum effect with no classical analog. In particular, we focus on the quantum mechanical analog of PR by varying with time the parabolic potential i.e. the frequency of the quantum harmonic oscillator <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.06228v1-abstract-full').style.display = 'none'; document.getElementById('2408.06228v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.00438">arXiv:2407.00438</a> <span> [<a href="https://arxiv.org/pdf/2407.00438">pdf</a>, <a href="https://arxiv.org/format/2407.00438">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computer Vision and Pattern Recognition">cs.CV</span> </div> </div> <p class="title is-5 mathjax"> AI Age Discrepancy: A Novel Parameter for Frailty Assessment in Kidney Tumor Patients </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seshadri%2C+R">Rikhil Seshadri</a>, <a href="/search/?searchtype=author&query=Siva%2C+J">Jayant Siva</a>, <a href="/search/?searchtype=author&query=Bartholomew%2C+A">Angelica Bartholomew</a>, <a href="/search/?searchtype=author&query=Goebel%2C+C">Clara Goebel</a>, <a href="/search/?searchtype=author&query=Wallerstein-King%2C+G">Gabriel Wallerstein-King</a>, <a href="/search/?searchtype=author&query=Morato%2C+B+L">Beatriz L贸pez Morato</a>, <a href="/search/?searchtype=author&query=Heller%2C+N">Nicholas Heller</a>, <a href="/search/?searchtype=author&query=Scovell%2C+J">Jason Scovell</a>, <a href="/search/?searchtype=author&query=Campbell%2C+R">Rebecca Campbell</a>, <a href="/search/?searchtype=author&query=Wood%2C+A">Andrew Wood</a>, <a href="/search/?searchtype=author&query=Ozery-Flato%2C+M">Michal Ozery-Flato</a>, <a href="/search/?searchtype=author&query=Barros%2C+V">Vesna Barros</a>, <a href="/search/?searchtype=author&query=Gabrani%2C+M">Maria Gabrani</a>, <a href="/search/?searchtype=author&query=Rosen-Zvi%2C+M">Michal Rosen-Zvi</a>, <a href="/search/?searchtype=author&query=Tejpaul%2C+R">Resha Tejpaul</a>, <a href="/search/?searchtype=author&query=Ramesh%2C+V">Vidhyalakshmi Ramesh</a>, <a href="/search/?searchtype=author&query=Papanikolopoulos%2C+N">Nikolaos Papanikolopoulos</a>, <a href="/search/?searchtype=author&query=Regmi%2C+S">Subodh Regmi</a>, <a href="/search/?searchtype=author&query=Ward%2C+R">Ryan Ward</a>, <a href="/search/?searchtype=author&query=Abouassaly%2C+R">Robert Abouassaly</a>, <a href="/search/?searchtype=author&query=Campbell%2C+S+C">Steven C. Campbell</a>, <a href="/search/?searchtype=author&query=Remer%2C+E">Erick Remer</a>, <a href="/search/?searchtype=author&query=Weight%2C+C">Christopher Weight</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.00438v2-abstract-short" style="display: inline;"> Kidney cancer is a global health concern, and accurate assessment of patient frailty is crucial for optimizing surgical outcomes. This paper introduces AI Age Discrepancy, a novel metric derived from machine learning analysis of preoperative abdominal CT scans, as a potential indicator of frailty and postoperative risk in kidney cancer patients. This retrospective study of 599 patients from the 20… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00438v2-abstract-full').style.display = 'inline'; document.getElementById('2407.00438v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.00438v2-abstract-full" style="display: none;"> Kidney cancer is a global health concern, and accurate assessment of patient frailty is crucial for optimizing surgical outcomes. This paper introduces AI Age Discrepancy, a novel metric derived from machine learning analysis of preoperative abdominal CT scans, as a potential indicator of frailty and postoperative risk in kidney cancer patients. This retrospective study of 599 patients from the 2023 Kidney Tumor Segmentation (KiTS) challenge dataset found that a higher AI Age Discrepancy is significantly associated with longer hospital stays and lower overall survival rates, independent of established factors. This suggests that AI Age Discrepancy may provide valuable insights into patient frailty and could thus inform clinical decision-making in kidney cancer treatment. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.00438v2-abstract-full').style.display = 'none'; document.getElementById('2407.00438v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 2 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 3 figures, 2 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2404.09197">arXiv:2404.09197</a> <span> [<a href="https://arxiv.org/pdf/2404.09197">pdf</a>, <a href="https://arxiv.org/format/2404.09197">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> </div> </div> <p class="title is-5 mathjax"> Investigating Cosmic Homogeneity Using Multi-fractal Analysis of the SDSS-IV eBOSS DR16 Quasar Catalog </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Goyal%2C+P">Priya Goyal</a>, <a href="/search/?searchtype=author&query=Malik%2C+S">Sunil Malik</a>, <a href="/search/?searchtype=author&query=Yadav%2C+J+k">Jaswant k. Yadav</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2404.09197v1-abstract-short" style="display: inline;"> We analyze the volume-limited subsamples extracted from the sixteenth data release of the SDSS-IV eBOSS quasar survey spanning a redshift interval of $0.8 < z < 2.2$, to estimate the scale of transition to homogeneity in the Universe. The multi-fractal analysis used for this purpose considers the scaling behavior of different moments of quasar distribution in different density environments. This a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.09197v1-abstract-full').style.display = 'inline'; document.getElementById('2404.09197v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2404.09197v1-abstract-full" style="display: none;"> We analyze the volume-limited subsamples extracted from the sixteenth data release of the SDSS-IV eBOSS quasar survey spanning a redshift interval of $0.8 < z < 2.2$, to estimate the scale of transition to homogeneity in the Universe. The multi-fractal analysis used for this purpose considers the scaling behavior of different moments of quasar distribution in different density environments. This analysis gives the spectrum of generalized dimension $D_q$, where positive values of $q$ characterize the scaling behavior in over-dense regions and the negative ones in under-dense regions. We expect fractal correlation dimension $D_q(r) = 3$, for a homogeneous, random point distribution in 3-Dimensions. The fractal correlation dimension $D_q(r)$, corresponding to $q=2$ obtained in our study stabilizes in the range (2.8-2.9) for scales $r>80$ $h^{-1}$ Mpc. The observed quasar distribution shows consistency with the simulated mock data and the random distribution of quasars within one sigma. Further, the generalized dimension spectrum $D_q(r)$ also reveals transition to homogeneity beyond $>110$ $h^{-1}$ Mpc, and the dominance of clustering at small scales $r<80$ $h^{-1}$ Mpc. Consequently, our study provides strong evidence for the homogeneity in SDSS quasar distribution, offering insights into large-scale structure properties and, thus can play a pivotal role in scrutinizing the clustering properties of quasars and its evolution in various upcoming surveys such as Dark Energy Spectroscopic Instrument (DESI) and Extremely Large Telescope (ELT). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2404.09197v1-abstract-full').style.display = 'none'; document.getElementById('2404.09197v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 8 figures, 1 table, Accepted for publication in MNRAS</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.14064">arXiv:2402.14064</a> <span> [<a href="https://arxiv.org/pdf/2402.14064">pdf</a>, <a href="https://arxiv.org/format/2402.14064">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> </div> <p class="title is-5 mathjax"> Microscopic origin of temperature-dependent magnetism in spin-orbit-coupled transition metal compounds </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Li%2C+Y">Ying Li</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a>, <a href="/search/?searchtype=author&query=Cheetham%2C+A+K">Anthony K. Cheetham</a>, <a href="/search/?searchtype=author&query=Valenti%2C+R">Roser Valenti</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2402.14064v2-abstract-short" style="display: inline;"> A few $4d$ and $5d$ transition metal compounds with various electron fillings were recently found to exhibit magnetic susceptibilities $蠂$ and magnetic moments that deviate from the well-established Kotani model. This model has been considered for decades to be the canonical expression to describe the temperature dependence of magnetism in systems with non-negligible spin-orbit coupling effects. I… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.14064v2-abstract-full').style.display = 'inline'; document.getElementById('2402.14064v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.14064v2-abstract-full" style="display: none;"> A few $4d$ and $5d$ transition metal compounds with various electron fillings were recently found to exhibit magnetic susceptibilities $蠂$ and magnetic moments that deviate from the well-established Kotani model. This model has been considered for decades to be the canonical expression to describe the temperature dependence of magnetism in systems with non-negligible spin-orbit coupling effects. In this work, we uncover the origin of such discrepancies and determine the applicability and limitations of the Kotani model by calculating the temperature dependence of the magnetic moments of a series of $4d$ (Ru-based) and $5d$ (W-based) systems at different electron fillings. For this purpose, we perform exact diagonalization of $ab~initio$-derived relativistic multiorbital Hubbard models on finite clusters and compute their magnetic susceptibilities. Comparison with experimentally measured magnetic properties indicates that contributions such as a temperature independent $蠂_0$ background, crystal field effects, Coulomb and Hund's couplings, and intersite interactions - not included in the Kotani model - are specially crucial to correctly describe the temperature dependence of $蠂$ and magnetic moments at various electron fillings in these systems. Based on our results, we propose a generalized approach to describe their magnetism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.14064v2-abstract-full').style.display = 'none'; document.getElementById('2402.14064v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">explained clearly the significance of deviations from Kotani model; added three-site cluster studies and calculations including the eg orbital</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.05685">arXiv:2401.05685</a> <span> [<a href="https://arxiv.org/pdf/2401.05685">pdf</a>, <a href="https://arxiv.org/format/2401.05685">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> Josephson Junction of Nodal Superconductors with Rashba and Ising Spin-Orbit coupling </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Cohen%2C+G">Gal Cohen</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ranjani Seshadri</a>, <a href="/search/?searchtype=author&query=Khodas%2C+M">Maxim Khodas</a>, <a href="/search/?searchtype=author&query=Meidan%2C+D">Dganit Meidan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.05685v1-abstract-short" style="display: inline;"> We study the effect of a Rashba spin-orbit coupling on the nodal superconducting phase of an Ising superconductor. Such nodal phase was predicted to occur when applying an in-plane field beyond the Pauli limit to a superconducting monolayer transition metal dichalcogenides (TMD). Generically, Rashba spin-orbit is known to lift the chiral symmetry that protects the nodal points, resulting in a full… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.05685v1-abstract-full').style.display = 'inline'; document.getElementById('2401.05685v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.05685v1-abstract-full" style="display: none;"> We study the effect of a Rashba spin-orbit coupling on the nodal superconducting phase of an Ising superconductor. Such nodal phase was predicted to occur when applying an in-plane field beyond the Pauli limit to a superconducting monolayer transition metal dichalcogenides (TMD). Generically, Rashba spin-orbit is known to lift the chiral symmetry that protects the nodal points, resulting in a fully gapped phase. However, when the magnetic field is applied along the $螕-K $ line, a residual vertical mirror symmetry protects a nodal crystalline phase. We study a single-band tight-binding model that captures the low energy physics around the $螕$ pocket of monolayer TMD. We calculate the topological properties, the edge state structure, and the current phase relation in a Josephson junction geometry of the nodal crystalline phase. We show that while the nodal crystalline phase is characterized by localized edge modes on non-self-reflecting boundaries, the current phase relation exhibits a trivial $2蟺$ periodicity in the presence of Rashba spin-orbit coupling. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.05685v1-abstract-full').style.display = 'none'; document.getElementById('2401.05685v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.15373">arXiv:2312.15373</a> <span> [<a href="https://arxiv.org/pdf/2312.15373">pdf</a>, <a href="https://arxiv.org/format/2312.15373">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Methodology">stat.ME</span> </div> </div> <p class="title is-5 mathjax"> A Multi-day Needs-based Modeling Approach for Activity and Travel Demand Analysis </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Chen%2C+K">Kexin Chen</a>, <a href="/search/?searchtype=author&query=Guan%2C+J">Jinping Guan</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Pattabhiraman%2C+V">Varun Pattabhiraman</a>, <a href="/search/?searchtype=author&query=Aboutaleb%2C+Y+M">Youssef Medhat Aboutaleb</a>, <a href="/search/?searchtype=author&query=Shamshiripour%2C+A">Ali Shamshiripour</a>, <a href="/search/?searchtype=author&query=Liang%2C+C">Chen Liang</a>, <a href="/search/?searchtype=author&query=Zhang%2C+X">Xiaochun Zhang</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2312.15373v1-abstract-short" style="display: inline;"> This paper proposes a multi-day needs-based model for activity and travel demand analysis. The model captures the multi-day dynamics in activity generation, which enables the modeling of activities with increased flexibility in time and space (e.g., e-commerce and remote working). As an enhancement to activity-based models, the proposed model captures the underlying decision-making process of acti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.15373v1-abstract-full').style.display = 'inline'; document.getElementById('2312.15373v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.15373v1-abstract-full" style="display: none;"> This paper proposes a multi-day needs-based model for activity and travel demand analysis. The model captures the multi-day dynamics in activity generation, which enables the modeling of activities with increased flexibility in time and space (e.g., e-commerce and remote working). As an enhancement to activity-based models, the proposed model captures the underlying decision-making process of activity generation by accounting for psychological needs as the drivers of activities. The level of need satisfaction is modeled as a psychological inventory, whose utility is optimized via decisions on activity participation, location, and duration. The utility includes both the benefit in the inventory gained and the cost in time, monetary expense as well as maintenance of safety stock. The model includes two sub-models, a Deterministic Model that optimizes the utility of the inventory, and an Empirical Model that accounts for heterogeneity and stochasticity. Numerical experiments are conducted to demonstrate model scalability. A maximum likelihood estimator is proposed, the properties of the log-likelihood function are examined and the recovery of true parameters is tested. This research contributes to the literature on transportation demand models in the following three aspects. First, it is arguably better grounded in psychological theory than traditional models and allows the generation of activity patterns to be policy-sensitive (while avoiding the need for ad hoc utility definitions). Second, it contributes to the development of needs-based models with a non-myopic approach to model multi-day activity patterns. Third, it proposes a tractable model formulation via problem reformulation and computational enhancements, which allows for maximum likelihood parameter estimation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.15373v1-abstract-full').style.display = 'none'; document.getElementById('2312.15373v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">38 pages, 11 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.02289">arXiv:2311.02289</a> <span> [<a href="https://arxiv.org/pdf/2311.02289">pdf</a>, <a href="https://arxiv.org/format/2311.02289">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.8.054204">10.1103/PhysRevMaterials.8.054204 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fidelity and variability in the interlayer electronic structure of the kagome superconductor CsV3Sb5 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Watkins%2C+A+K">Aurland K. Watkins</a>, <a href="/search/?searchtype=author&query=Johrendt%2C+D">Dirk Johrendt</a>, <a href="/search/?searchtype=author&query=Vlcek%2C+V">Vojtech Vlcek</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2311.02289v1-abstract-short" style="display: inline;"> The AV3Sb5 (A = K, Rb, Cs) kagome materials host an interplay of emergent phenomena including superconductivity, charge density wave states, and non-trivial electronic structure topology. The band structures of these materials exhibit a rich variety of features like Dirac crossings, saddle points associated with van Hove singularities, and flat bands prompting significant investigations into the i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.02289v1-abstract-full').style.display = 'inline'; document.getElementById('2311.02289v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.02289v1-abstract-full" style="display: none;"> The AV3Sb5 (A = K, Rb, Cs) kagome materials host an interplay of emergent phenomena including superconductivity, charge density wave states, and non-trivial electronic structure topology. The band structures of these materials exhibit a rich variety of features like Dirac crossings, saddle points associated with van Hove singularities, and flat bands prompting significant investigations into the in-plane electronic behavior. However, recent findings including the charge density wave ordering and effects due to pressure or chemical doping point to the importance of understanding interactions between kagome layers. Probing this c-axis electronic structure via experimental methods remains challenging due to limitations of the crystals and, therefore, rigorous computational approaches are necessary to study the interlayer interactions. Here we use first-principles approaches to study the electronic structure of CsV3Sb5 with emphasis on the kz dispersion. We find that the inclusion of nonlocal and dynamical many-body correlation has a substantial impact on the interlayer band structure. We present new band behavior that additionally supports the integration of symmetry in accurately plotting electronic structures and influences further analysis like the calculation of topological invariants. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.02289v1-abstract-full').style.display = 'none'; document.getElementById('2311.02289v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.07053">arXiv:2310.07053</a> <span> [<a href="https://arxiv.org/pdf/2310.07053">pdf</a>, <a href="https://arxiv.org/format/2310.07053">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1021/acs.chemmater.3c02814">10.1021/acs.chemmater.3c02814 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Soft-Chemical Synthesis, Structure Evolution, and Insulator-to-Metal Transition in a Prototypical Metal Oxide, 位-RhO$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Chamorro%2C+J+R">Juan R. Chamorro</a>, <a href="/search/?searchtype=author&query=Zuo%2C+J+L">Julia L. Zuo</a>, <a href="/search/?searchtype=author&query=Bassey%2C+E+N">Euan N. Bassey</a>, <a href="/search/?searchtype=author&query=Watkins%2C+A+K">Aurland K. Watkins</a>, <a href="/search/?searchtype=author&query=Zhu%2C+G">Guomin Zhu</a>, <a href="/search/?searchtype=author&query=Zohar%2C+A">Arava Zohar</a>, <a href="/search/?searchtype=author&query=Wyckoff%2C+K+E">Kira E. Wyckoff</a>, <a href="/search/?searchtype=author&query=Kinnibrugh%2C+T+L">Tiffany L. Kinnibrugh</a>, <a href="/search/?searchtype=author&query=Lapidus%2C+S+H">Saul H. Lapidus</a>, <a href="/search/?searchtype=author&query=Stemmer%2C+S">Susanne Stemmer</a>, <a href="/search/?searchtype=author&query=Cl%C3%A9ment%2C+R+J">Rapha毛le J. Cl茅ment</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2310.07053v1-abstract-short" style="display: inline;"> $位$-RhO$_2$, a prototype 4d transition metal oxide, has been prepared by oxidative delithiation of spinel LiRh$_2$O$_4$ using ceric ammonium nitrate. Average-structure studies of this RhO$_2… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.07053v1-abstract-full').style.display = 'inline'; document.getElementById('2310.07053v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.07053v1-abstract-full" style="display: none;"> $位$-RhO$_2$, a prototype 4d transition metal oxide, has been prepared by oxidative delithiation of spinel LiRh$_2$O$_4$ using ceric ammonium nitrate. Average-structure studies of this RhO$_2$ polytype, including synchrotron powder X-ray diffraction and electron diffraction, indicate the room temperature structure to be tetragonal, in the space group I41/amd, with a first-order structural transition to cubic Fd-3m at T = 345 K on warming. Synchrotron X-ray pair distribution function analysis and $^7$Li solid state nuclear magnetic resonance measurements suggest that the room temperature structure displays local Rh-Rh bonding. The formation of these local dimers appears to be associated with a metal-to insulator transition with a non-magnetic ground state, as also supported by density functional theory-based electronic structure calculations. This contribution demonstrates the power of soft chemistry to kinetically stabilize a surprisingly simple binary oxide compound. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.07053v1-abstract-full').style.display = 'none'; document.getElementById('2310.07053v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.04079">arXiv:2310.04079</a> <span> [<a href="https://arxiv.org/pdf/2310.04079">pdf</a>, <a href="https://arxiv.org/format/2310.04079">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/mnras/stad3026">10.1093/mnras/stad3026 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> AstroSat observation of the magnetar SGR J1830$-$0645 during its first detected X-ray outburst </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Sharma%2C+R">Rahul Sharma</a>, <a href="/search/?searchtype=author&query=Jain%2C+C">Chetana Jain</a>, <a href="/search/?searchtype=author&query=Paul%2C+B">Biswajit Paul</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2310.04079v2-abstract-short" style="display: inline;"> We present here timing and spectral analyses of SGR J1830$-$0645 based on an AstroSat observation carried out on 2020 October 16, about a week after the onset of its first detected X-ray outburst. Using data taken with the Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counter (LAXPC), we have detected 0.9$-$10 keV coherent pulsations at a period of $\sim$10.4 s. The pulse profiles w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.04079v2-abstract-full').style.display = 'inline'; document.getElementById('2310.04079v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.04079v2-abstract-full" style="display: none;"> We present here timing and spectral analyses of SGR J1830$-$0645 based on an AstroSat observation carried out on 2020 October 16, about a week after the onset of its first detected X-ray outburst. Using data taken with the Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counter (LAXPC), we have detected 0.9$-$10 keV coherent pulsations at a period of $\sim$10.4 s. The pulse profiles were single-peaked, asymmetric and consisted of minor peaks attributable to hotspots on the neutron star surface. The pulsed fraction evolved significantly with energy, increasing to energies around 5 keV with a steep drop thereafter. The 0.9--25 keV SXT--LAXPC energy spectrum is best described with two thermal components having temperatures $\sim$0.46 and $\sim$1.1 keV (emission radii of $\sim$2.4 and $\sim$0.65 km, respectively, assuming a distance of 4 kpc) along with a power-law component having a photon index of $\sim$0.39. We report the detection of 67 X-ray bursts having an average duration of $\sim$33 ms. The brightest burst lasted for about 90 ms and had a 3--25 keV fluence of $\sim 5 \times 10^{-9}$ erg cm$^{-2}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.04079v2-abstract-full').style.display = 'none'; document.getElementById('2310.04079v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in MNRAS, updated after proof corrections</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.16168">arXiv:2309.16168</a> <span> [<a href="https://arxiv.org/pdf/2309.16168">pdf</a>, <a href="https://arxiv.org/format/2309.16168">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Magnetism and magnetocaloric properties of Co$_{1-x}$Mn$_x$Cr$_2$O$_4$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Cooley%2C+J+A">Joya A. Cooley</a>, <a href="/search/?searchtype=author&query=Dairaghi%2C+G">Gregor Dairaghi</a>, <a href="/search/?searchtype=author&query=Moore%2C+G+C">Guy C. Moore</a>, <a href="/search/?searchtype=author&query=Horton%2C+M+K">Matthew K. Horton</a>, <a href="/search/?searchtype=author&query=Schueller%2C+E+C">Emily C. Schueller</a>, <a href="/search/?searchtype=author&query=Persson%2C+K+A">Kristin A. Persson</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2309.16168v1-abstract-short" style="display: inline;"> Co$_{1-x}$Mn$_x$Cr$_2$O$_4$ crystallizes as a normal spinel in the cubic $Fd \overline{3}m$ space group, and the end members have been reported to display a region of collinear ferrimagnetism as well as a low-temperature spin-spiral state with variable coherence lengths from 3 nm to 10 nm in polycrystalline samples. Here, we present the synthesis of the entire solid solution, and data showing that… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.16168v1-abstract-full').style.display = 'inline'; document.getElementById('2309.16168v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.16168v1-abstract-full" style="display: none;"> Co$_{1-x}$Mn$_x$Cr$_2$O$_4$ crystallizes as a normal spinel in the cubic $Fd \overline{3}m$ space group, and the end members have been reported to display a region of collinear ferrimagnetism as well as a low-temperature spin-spiral state with variable coherence lengths from 3 nm to 10 nm in polycrystalline samples. Here, we present the synthesis of the entire solid solution, and data showing that the ferrimagnetic ordering temperature as well as the spin-spiral lock-in temperature are tunable with the Co/Mn ratio. The peak magnetocaloric entropy change was determined to be $螖S_M$ = -5.63 J kg$^{-1}$ K$^{-1}$ in an applied magnetic field change of $螖H$ = 0 T to 5 T for the Mn end-member at the ferrimagnetic ordering temperature. Using density functional theory (DFT), we explore the shortcomings of the magnetic deformation proxy to identify trends in $螖S_M$ across composition in this spinel system, and explore future extensions of theory to address these discrepancies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.16168v1-abstract-full').style.display = 'none'; document.getElementById('2309.16168v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.03332">arXiv:2309.03332</a> <span> [<a href="https://arxiv.org/pdf/2309.03332">pdf</a>, <a href="https://arxiv.org/format/2309.03332">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.7.094402">10.1103/PhysRevMaterials.7.094402 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetic order in the $S_{\mathrm{eff}}$ = 1/2 triangular-lattice compound NdCd$_3$P$_3$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Chamorro%2C+J+R">Juan R. Chamorro</a>, <a href="/search/?searchtype=author&query=Jackson%2C+A+R">Azzedin R. Jackson</a>, <a href="/search/?searchtype=author&query=Watkins%2C+A+K">Aurland K. Watkins</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2309.03332v1-abstract-short" style="display: inline;"> We present and characterize a new member of the $R$Cd$_3$P$_3$ ($R$= rare earth) family of materials, NdCd$_3$P$_3$, which possesses Nd$^{3+}$ cations arranged on well-separated triangular lattice layers. Magnetic susceptibility and heat capacity measurements demonstrate a likely $S_{\mathrm{eff}}$ = 1/2 ground state, and also reveal the formation of long-range antiferromagnetic order at… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.03332v1-abstract-full').style.display = 'inline'; document.getElementById('2309.03332v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.03332v1-abstract-full" style="display: none;"> We present and characterize a new member of the $R$Cd$_3$P$_3$ ($R$= rare earth) family of materials, NdCd$_3$P$_3$, which possesses Nd$^{3+}$ cations arranged on well-separated triangular lattice layers. Magnetic susceptibility and heat capacity measurements demonstrate a likely $S_{\mathrm{eff}}$ = 1/2 ground state, and also reveal the formation of long-range antiferromagnetic order at $T_{N} = 0.34$ K. Via measurements of magnetization, heat capacity, and electrical resistivity, we characterize the electronic properties of NdCd$_3$P$_3$ and compare results to density functional theory calculations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.03332v1-abstract-full').style.display = 'none'; document.getElementById('2309.03332v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication at Physical Review Materials</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.04558">arXiv:2308.04558</a> <span> [<a href="https://arxiv.org/pdf/2308.04558">pdf</a>, <a href="https://arxiv.org/format/2308.04558">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.7.104406">10.1103/PhysRevMaterials.7.104406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Canted Antiferromagnetism in Polar MnSiN$_2$ with High N茅el Temperature </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kautzsch%2C+L">Linus Kautzsch</a>, <a href="/search/?searchtype=author&query=Georgescu%2C+A+B">Alexandru B. Georgescu</a>, <a href="/search/?searchtype=author&query=Puggioni%2C+D">Danilo Puggioni</a>, <a href="/search/?searchtype=author&query=Kent%2C+G">Greggory Kent</a>, <a href="/search/?searchtype=author&query=Taddei%2C+K+M">Keith M. Taddei</a>, <a href="/search/?searchtype=author&query=Reilly%2C+A">Aiden Reilly</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Rondinelli%2C+J+M">James M. Rondinelli</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2308.04558v2-abstract-short" style="display: inline;"> MnSiN$_2$ is a transition metal nitride with Mn and Si ions displaying an ordered distribution on the cation sites of a distorted wurtzite-derived structure. The Mn$^{2+}$ ions reside on a 3D diamond-like covalent network with strong superexchange pathways. We simulate its electronic structure and find that the N anions in MnSiN$_2$ act as $蟽$- and $蟺$-donors, which serve to enhance the N-mediated… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.04558v2-abstract-full').style.display = 'inline'; document.getElementById('2308.04558v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.04558v2-abstract-full" style="display: none;"> MnSiN$_2$ is a transition metal nitride with Mn and Si ions displaying an ordered distribution on the cation sites of a distorted wurtzite-derived structure. The Mn$^{2+}$ ions reside on a 3D diamond-like covalent network with strong superexchange pathways. We simulate its electronic structure and find that the N anions in MnSiN$_2$ act as $蟽$- and $蟺$-donors, which serve to enhance the N-mediated superexchange, leading to the high N茅el ordering temperature of $T_N$ = 443 K. Polycrystalline samples of MnSiN$_2$ were prepared to reexamine the magnetic structure and resolve previously reported discrepancies. An additional magnetic canting transition is observed at $T_\mathrm{cant}$ = 433 K and the precise canted ground state magnetic structure has been resolved using a combination of DFT calculations and powder neutron diffraction. The calculations favor a $G$-type antiferromagnetic spin order with lowering to $Pc^\prime$. Irreducible representation analysis of the magnetic Bragg peaks supports the lowering of the magnetic symmetry. The computed model includes a 10$^\circ$ rotation of the magnetic spins away from the crystallographic $c$-axis consistent with measured powder neutron diffraction data modeling and a small canting of 0.6$^\circ$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.04558v2-abstract-full').style.display = 'none'; document.getElementById('2308.04558v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 October, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 7 (2023) 104406 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2307.08042">arXiv:2307.08042</a> <span> [<a href="https://arxiv.org/pdf/2307.08042">pdf</a>, <a href="https://arxiv.org/format/2307.08042">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.108.235406">10.1103/PhysRevB.108.235406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Optical conductivity of a topological system driven using a realistic pulse </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ranjani Seshadri</a>, <a href="/search/?searchtype=author&query=Pereg-Barnea%2C+T">T. Pereg-Barnea</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2307.08042v1-abstract-short" style="display: inline;"> The effect of a time-periodic perturbation, such as radiation, on a system otherwise at equilibrium has been studied in the context of Floquet theory with stationary states replaced by Floquet states and the energy replaced by quasienergy. These quasienergy bands in general differ from the energy bands in their dispersion and, especially in the presence of spin-orbit coupling, in their states. Thi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.08042v1-abstract-full').style.display = 'inline'; document.getElementById('2307.08042v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.08042v1-abstract-full" style="display: none;"> The effect of a time-periodic perturbation, such as radiation, on a system otherwise at equilibrium has been studied in the context of Floquet theory with stationary states replaced by Floquet states and the energy replaced by quasienergy. These quasienergy bands in general differ from the energy bands in their dispersion and, especially in the presence of spin-orbit coupling, in their states. This may, in some cases, alter the topology when the quasienergy bands exhibit different topological invariants than their stationary counterparts. In this work, motivated by advances in pump-probe techniques, we consider the optical response of driven topological systems when the drive is not purely periodic but is instead multiplied by a pulse shape/envelope function. We use real time-evolved states to calculate the optical conductivity and compare it to the response calculated using Floquet theory. We find that the conductivity bears a memory of the initial equilibrium state even when the pump is turned on slowly and the measurement is taken well after the ramp. The response of the time-evolved system is interpreted as coming from Floquet bands whose population has been determined by their overlap with the initial equilibrium state. In particular, at band inversion points in the Brillouin zone the population of the Floquet bands is inverted as well. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.08042v1-abstract-full').style.display = 'none'; document.getElementById('2307.08042v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2305.07318">arXiv:2305.07318</a> <span> [<a href="https://arxiv.org/pdf/2305.07318">pdf</a>, <a href="https://arxiv.org/format/2305.07318">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="General Economics">econ.GN</span> </div> </div> <p class="title is-5 mathjax"> Evaluating congestion pricing schemes using agent-based passenger and freight microsimulation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Jing%2C+P">Peiyu Jing</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Sakai%2C+T">Takanori Sakai</a>, <a href="/search/?searchtype=author&query=Shamshiripour%2C+A">Ali Shamshiripour</a>, <a href="/search/?searchtype=author&query=Alho%2C+A+R">Andre Romano Alho</a>, <a href="/search/?searchtype=author&query=Lentzakis%2C+A">Antonios Lentzakis</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M+E">Moshe E. Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2305.07318v1-abstract-short" style="display: inline;"> The distributional impacts of congestion pricing have been widely studied in the literature and the evidence on this is mixed. Some studies find that pricing is regressive whereas others suggest that it can be progressive or neutral depending on the specific spatial characteristics of the urban region, existing activity and travel patterns, and the design of the pricing scheme. Moreover, the welfa… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.07318v1-abstract-full').style.display = 'inline'; document.getElementById('2305.07318v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.07318v1-abstract-full" style="display: none;"> The distributional impacts of congestion pricing have been widely studied in the literature and the evidence on this is mixed. Some studies find that pricing is regressive whereas others suggest that it can be progressive or neutral depending on the specific spatial characteristics of the urban region, existing activity and travel patterns, and the design of the pricing scheme. Moreover, the welfare and distributional impacts of pricing have largely been studied in the context of passenger travel whereas freight has received relatively less attention. In this paper, we examine the impacts of several third-best congestion pricing schemes on both passenger transport and freight in an integrated manner using a large-scale microsimulator (SimMobility) that explicitly simulates the behavioral decisions of the entire population of individuals and business establishments, dynamic multimodal network performance, and their interactions. Through simulations of a prototypical North American city, we find that a distance-based pricing scheme yields the largest welfare gains, although the gains are a modest fraction of toll revenues (around 30\%). In the absence of revenue recycling or redistribution, distance-based and cordon-based schemes are found to be particularly regressive. On average, lower income individuals lose as a result of the scheme, whereas higher income individuals gain. A similar trend is observed in the context of shippers -- small establishments having lower shipment values lose on average whereas larger establishments with higher shipment values gain. We perform a detailed spatial analysis of distributional outcomes, and examine the impacts on network performance, activity generation, mode and departure time choices, and logistics operations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.07318v1-abstract-full').style.display = 'none'; document.getElementById('2305.07318v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.13698">arXiv:2302.13698</a> <span> [<a href="https://arxiv.org/pdf/2302.13698">pdf</a>, <a href="https://arxiv.org/format/2302.13698">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1142/S0218271824500068">10.1142/S0218271824500068 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Universe bouncing its way to inflation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kaur%2C+M">Manjeet Kaur</a>, <a href="/search/?searchtype=author&query=Nandi%2C+D">Debottam Nandi</a>, <a href="/search/?searchtype=author&query=Choudhury%2C+D">Debajyoti Choudhury</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.13698v2-abstract-short" style="display: inline;"> Cosmological models with inflation and those with bounce have their own strengths and weaknesses. Here we construct a model in which a phase of bounce is followed by a viable inflationary phase. This incorporates several advantages of both and hence, is a more viable model for cosmic evolution. We explore scenarios wherein the bouncing phase smoothly transits to an inflationary one, with the pivot… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.13698v2-abstract-full').style.display = 'inline'; document.getElementById('2302.13698v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.13698v2-abstract-full" style="display: none;"> Cosmological models with inflation and those with bounce have their own strengths and weaknesses. Here we construct a model in which a phase of bounce is followed by a viable inflationary phase. This incorporates several advantages of both and hence, is a more viable model for cosmic evolution. We explore scenarios wherein the bouncing phase smoothly transits to an inflationary one, with the pivot scale leaving the Hubble horizon during the latter era, thereby maintaining consistency with observations. Staying within the ambit of Einstein-Hilbert gravity augmented by the inflaton, we ensure a pre-inflationary bounce by introducing a second scalar field that helps engineer the requisite violation of the null energy condition. Potential ghost instabilities can be mitigated by invoking a non-trivial coupling between the two scalar fields. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.13698v2-abstract-full').style.display = 'none'; document.getElementById('2302.13698v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">34 pages, 7 figures, Published in Int.J.Mod.Phys.D</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Int.J.Mod.Phys.D 33 (2024) 2450006 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.12354">arXiv:2302.12354</a> <span> [<a href="https://arxiv.org/pdf/2302.12354">pdf</a>, <a href="https://arxiv.org/format/2302.12354">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.7.064201">10.1103/PhysRevMaterials.7.064201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> YbV$_3$Sb$_4$ and EuV$_3$Sb$_4$, vanadium-based kagome metals with Yb$^{2+}$ and Eu$^{2+}$ zig-zag chains </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Pokharel%2C+G">Ganesh Pokharel</a>, <a href="/search/?searchtype=author&query=Gundayao%2C+M">Malia Gundayao</a>, <a href="/search/?searchtype=author&query=Li%2C+H">Hong Li</a>, <a href="/search/?searchtype=author&query=Kaboudvand%2C+F">Farnaz Kaboudvand</a>, <a href="/search/?searchtype=author&query=Kautzsch%2C+L">Linus Kautzsch</a>, <a href="/search/?searchtype=author&query=Sarker%2C+S">Suchismita Sarker</a>, <a href="/search/?searchtype=author&query=Ruff%2C+J+P+C">Jacob P. C. Ruff</a>, <a href="/search/?searchtype=author&query=Hogan%2C+T">Tom Hogan</a>, <a href="/search/?searchtype=author&query=Alvarado%2C+S+J+G">Steven J. Gomez Alvarado</a>, <a href="/search/?searchtype=author&query=Sarte%2C+P+M">Paul M. Sarte</a>, <a href="/search/?searchtype=author&query=Wu%2C+G">Guang Wu</a>, <a href="/search/?searchtype=author&query=Braden%2C+T">Tara Braden</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Toberer%2C+E+S">Eric S. Toberer</a>, <a href="/search/?searchtype=author&query=Zeljkovic%2C+I">Ilija Zeljkovic</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.12354v3-abstract-short" style="display: inline;"> Here we present YbV$_3$Sb$_4$ and EuV$_3$Sb$_4$, two new compounds exhibiting slightly distorted vanadium-based kagome nets interleaved with zig-zag chains of divalent Yb$^{2+}$ and Eu$^{2+}$ ions. Single crystal growth methods are reported alongside magnetic, electronic, and thermodynamic measurements. YbV$_3$Sb$_4$ is a nonmagnetic metal with no collective phase transitions observed between 60mK… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12354v3-abstract-full').style.display = 'inline'; document.getElementById('2302.12354v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.12354v3-abstract-full" style="display: none;"> Here we present YbV$_3$Sb$_4$ and EuV$_3$Sb$_4$, two new compounds exhibiting slightly distorted vanadium-based kagome nets interleaved with zig-zag chains of divalent Yb$^{2+}$ and Eu$^{2+}$ ions. Single crystal growth methods are reported alongside magnetic, electronic, and thermodynamic measurements. YbV$_3$Sb$_4$ is a nonmagnetic metal with no collective phase transitions observed between 60mK and 300K. Conversely, EuV$_3$Sb$_4$ is a magnetic kagome metal exhibiting easy-plane ferromagnetic-like order below $T_\text{C}$=32K with signatures of noncollinearity under low field. Our discovery of YbV$_3$Sb$_4$ and EuV$_3$Sb$_4$ demonstrate another direction for the discovery and development of vanadium-based kagome metals while incorporating the chemical and magnetic degrees of freedom offered by a rare-earth sublattice. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.12354v3-abstract-full').style.display = 'none'; document.getElementById('2302.12354v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2302.05712">arXiv:2302.05712</a> <span> [<a href="https://arxiv.org/pdf/2302.05712">pdf</a>, <a href="https://arxiv.org/ps/2302.05712">ps</a>, <a href="https://arxiv.org/format/2302.05712">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Exactly Solvable and Integrable Systems">nlin.SI</span> </div> </div> <p class="title is-5 mathjax"> Symmetries and Lie Algebra of Ramanujan Equation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Halder%2C+A+K">Amlan K Halder</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Rajeswari Seshadri</a>, <a href="/search/?searchtype=author&query=Sinuvasan%2C+R">R Sinuvasan</a>, <a href="/search/?searchtype=author&query=Leach%2C+P">PGL Leach</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2302.05712v1-abstract-short" style="display: inline;"> Symmetry analysis of Ramanujan's system of differential equations is performed by representing it as a third-order equation. A new system consisting of a second-order and a first-order equation is derived from Ramanujan's system. The Lie algebra of the new system is equivalent to the algebra of the third-order equation. This forms the basis of our intuition that for a system of first-order odes it… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.05712v1-abstract-full').style.display = 'inline'; document.getElementById('2302.05712v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2302.05712v1-abstract-full" style="display: none;"> Symmetry analysis of Ramanujan's system of differential equations is performed by representing it as a third-order equation. A new system consisting of a second-order and a first-order equation is derived from Ramanujan's system. The Lie algebra of the new system is equivalent to the algebra of the third-order equation. This forms the basis of our intuition that for a system of first-order odes its infinite-dimensional algebra of symmetries contains a subalgebra which is a representation of the Lie algebra for any system or differential equation which can be obtained from the original system, even though the transformations are not point. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2302.05712v1-abstract-full').style.display = 'none'; document.getElementById('2302.05712v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 34A05; 34A34; 34C14; 22E60 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2212.13976">arXiv:2212.13976</a> <span> [<a href="https://arxiv.org/pdf/2212.13976">pdf</a>, <a href="https://arxiv.org/format/2212.13976">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/2053-1591/acb906">10.1088/2053-1591/acb906 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Floquet topological phases on a honeycomb lattice using elliptically polarized light </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ranjani Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2212.13976v1-abstract-short" style="display: inline;"> We study the effect of driving a two-dimensional honeycomb system out of equilibrium using an elliptically polarized light as a time-dependent perturbation. In particular, we try to understand the topological phase diagram of this driven system when the external drive is a vector potential given by ${\bf A}(t) = (A_{0x} \cos(惟t), A_{0y} \cos(惟t + 蠁_0))$. These topological phases are characterized… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.13976v1-abstract-full').style.display = 'inline'; document.getElementById('2212.13976v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.13976v1-abstract-full" style="display: none;"> We study the effect of driving a two-dimensional honeycomb system out of equilibrium using an elliptically polarized light as a time-dependent perturbation. In particular, we try to understand the topological phase diagram of this driven system when the external drive is a vector potential given by ${\bf A}(t) = (A_{0x} \cos(惟t), A_{0y} \cos(惟t + 蠁_0))$. These topological phases are characterized by the Floquet Chern number which, in each of these phases, is related to the number of robust edge modes on a nanoribbon. We show that varying the ratio $A_{0x}/A_{0y}$ of the external drive is a possible way to take the system from a trivial to a topological phase and vice versa. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.13976v1-abstract-full').style.display = 'none'; document.getElementById('2212.13976v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2212.00931">arXiv:2212.00931</a> <span> [<a href="https://arxiv.org/pdf/2212.00931">pdf</a>, <a href="https://arxiv.org/format/2212.00931">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.7.044401">10.1103/PhysRevMaterials.7.044401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Inducing Skyrmion Flop Transitions in Co$_8$Zn$_8$Mn$_4$ at Room Temperature </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Meynell%2C+S+A">Simon A. Meynell</a>, <a href="/search/?searchtype=author&query=Eggeler%2C+Y+M">Yolita M. Eggeler</a>, <a href="/search/?searchtype=author&query=Bocarsly%2C+J+D">Joshua D. Bocarsly</a>, <a href="/search/?searchtype=author&query=Kitchaev%2C+D+A">Daniil A. Kitchaev</a>, <a href="/search/?searchtype=author&query=Rhodes%2C+B+E">Bailey E. Rhodes</a>, <a href="/search/?searchtype=author&query=Pollock%2C+T+M">Tresa M. Pollock</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a>, <a href="/search/?searchtype=author&query=Van+der+Ven%2C+A">Anton Van der Ven</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=De+Graef%2C+M">Marc De Graef</a>, <a href="/search/?searchtype=author&query=Jayich%2C+A+B">Ania Bleszynski Jayich</a>, <a href="/search/?searchtype=author&query=Gianola%2C+D+S">Daniel S. Gianola</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2212.00931v1-abstract-short" style="display: inline;"> Magnetic skyrmions are topologically-protected spin textures that manifest in certain non-centrosymmetric ferromagnets under the right conditions of temperature and field. In thin film skyrmion hosts, demagnetization effects combined with geometric confinement can result in two distinct types of spin textures: those with their axis of symmetry in the plane of the film (IP) and those with their axi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.00931v1-abstract-full').style.display = 'inline'; document.getElementById('2212.00931v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2212.00931v1-abstract-full" style="display: none;"> Magnetic skyrmions are topologically-protected spin textures that manifest in certain non-centrosymmetric ferromagnets under the right conditions of temperature and field. In thin film skyrmion hosts, demagnetization effects combined with geometric confinement can result in two distinct types of spin textures: those with their axis of symmetry in the plane of the film (IP) and those with their axis pointing out-of-plane (OOP). Here we present Lorentz transmission electron microscopy evidence in conjunction with numerical modeling showing a flop transition between IP and OOP skyrmions in Co$_8$Zn$_8$Mn$_4$ at room temperature. We show that this skyrmion flop transition is controllable via the angle of the external field relative to the film normal and we illustrate how this transition depends on thickness. Finally, we propose a skyrmion-writing device that utilizes the details of this transition. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2212.00931v1-abstract-full').style.display = 'none'; document.getElementById('2212.00931v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 December, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.16602">arXiv:2211.16602</a> <span> [<a href="https://arxiv.org/pdf/2211.16602">pdf</a>, <a href="https://arxiv.org/format/2211.16602">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.7.024806">10.1103/PhysRevMaterials.7.024806 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Structural evolution of the kagome superconductors $A$V$_3$Sb$_5$ ($A$ = K, Rb, and Cs) through charge density wave order </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kautzsch%2C+L">Linus Kautzsch</a>, <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Mallayya%2C+K">Krishnanand Mallayya</a>, <a href="/search/?searchtype=author&query=Plumb%2C+J">Jayden Plumb</a>, <a href="/search/?searchtype=author&query=Pokharel%2C+G">Ganesh Pokharel</a>, <a href="/search/?searchtype=author&query=Ruff%2C+J+P+C">Jacob P. C. Ruff</a>, <a href="/search/?searchtype=author&query=Islam%2C+Z">Zahirul Islam</a>, <a href="/search/?searchtype=author&query=Kim%2C+E">Eun-Ah Kim</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2211.16602v3-abstract-short" style="display: inline;"> The kagome superconductors KV$_3$Sb$_5$, RbV$_3$Sb$_5$, and CsV$_3$Sb$_5$ are known to display charge density wave (CDW) order which impacts the topological characteristics of their electronic structure. Details of their structural ground states and how they evolve with temperature are revealed here using single crystal X-ray crystallographic refinements as a function of temperature, carried out w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.16602v3-abstract-full').style.display = 'inline'; document.getElementById('2211.16602v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.16602v3-abstract-full" style="display: none;"> The kagome superconductors KV$_3$Sb$_5$, RbV$_3$Sb$_5$, and CsV$_3$Sb$_5$ are known to display charge density wave (CDW) order which impacts the topological characteristics of their electronic structure. Details of their structural ground states and how they evolve with temperature are revealed here using single crystal X-ray crystallographic refinements as a function of temperature, carried out with synchrotron radiation. The compounds KV$_3$Sb$_5$ and RbV$_3$Sb$_5$ present 2$\times$2$\times$2 superstructures in the $Fmmm$ space group with a staggered tri-hexagonal deformation of vanadium layers. CsV$_3$Sb$_5$ displays more complex structural evolution, whose details have been unravelled by applying machine learning methods to the scattering data. Upon cooling through the CDW transition, CsV$_3$Sb$_5$ displays a staged progression of ordering from a 2$\times$2$\times$1 supercell and a 2$\times$2$\times$2 supercell into a final 2$\times$2$\times$4 supercell that persists to $T$ = 11 K and exhibits an average structure where vanadium layers display both tri-hexagonal and Star of David patterns of deformations. Diffraction from CsV$_3$Sb$_5$ under pulsed magnetic fields up to $渭_0H$ = 28 T suggest the real component of the CDW state is insensitive to external magnetic fields. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.16602v3-abstract-full').style.display = 'none'; document.getElementById('2211.16602v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 6 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 7 (2023) 024806 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.11656">arXiv:2209.11656</a> <span> [<a href="https://arxiv.org/pdf/2209.11656">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1515/znb-2022-0125">10.1515/znb-2022-0125 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The kagom茅 metals RbTi$_3$Bi$_5$ and CsTi$_3$Bi$_5$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Werhahn%2C+D">Dominik Werhahn</a>, <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Hay%2C+A+K">Aurland K. Hay</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Johrendt%2C+D">Dirk Johrendt</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.11656v2-abstract-short" style="display: inline;"> The kagom茅 metals RbTi$_3$Bi$_5$ and CsTi$_3$Bi$_5$ were synthesized both as polycrystalline powders by heating the elements an argon atmosphere and as single crystals grown using a self-flux method. The compounds crystallize in the hexagonal crystal system isotypically to KV$_3$Sb$_5$ (P6/mmm, Z = 1, CsTi3Bi5: a = 5.7873(1) 脜, c = 9.2062(1) 脜; RbTi3Bi5: a = 5.773(1) 脜, c = 9.065(1) 脜). Titanium a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.11656v2-abstract-full').style.display = 'inline'; document.getElementById('2209.11656v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.11656v2-abstract-full" style="display: none;"> The kagom茅 metals RbTi$_3$Bi$_5$ and CsTi$_3$Bi$_5$ were synthesized both as polycrystalline powders by heating the elements an argon atmosphere and as single crystals grown using a self-flux method. The compounds crystallize in the hexagonal crystal system isotypically to KV$_3$Sb$_5$ (P6/mmm, Z = 1, CsTi3Bi5: a = 5.7873(1) 脜, c = 9.2062(1) 脜; RbTi3Bi5: a = 5.773(1) 脜, c = 9.065(1) 脜). Titanium atoms form a kagom茅 net with bismuth atoms in the hexagons as well as above and below the triangles. The alkali metal atoms are coordinated by 12 bismuth atoms and form AlB$_2$-like slabs between the kagom茅 layers. Magnetic susceptibility measurements with CsTi$_3$Bi$_5$ and RbTi$_3$Bi$_5$ single crystals reveal Pauli-paramagnetism and traces of superconductivity caused by CsBi$_2$/RbBi$_2$ impurities. Magnetotransport measurements reveal conventional Fermi liquid behavior and quantum oscillations indicative of a single dominant orbit at low temperature. DFT calculations show the characteristic metallic kagom茅 band structure similar to that of CsV$_3$Sb$_5$ with reduced band filling. A symmetry analysis of the band structure does not reveal an obvious and unique signature of a nontrivial topology. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.11656v2-abstract-full').style.display = 'none'; document.getElementById('2209.11656v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 5 Figures, submitted</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Z. Naturforsch. 2022, 77b, 757-764 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.01509">arXiv:2209.01509</a> <span> [<a href="https://arxiv.org/pdf/2209.01509">pdf</a>, <a href="https://arxiv.org/format/2209.01509">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Astrophysics of Galaxies">astro-ph.GA</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Solar and Stellar Astrophysics">astro-ph.SR</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/mnras/stac2487">10.1093/mnras/stac2487 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Core orientations and magnetic fields in isolated molecular clouds </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Sharma%2C+E">Ekta Sharma</a>, <a href="/search/?searchtype=author&query=Gopinathan%2C+M">Maheswar Gopinathan</a>, <a href="/search/?searchtype=author&query=Soam%2C+A">Archana Soam</a>, <a href="/search/?searchtype=author&query=Lee%2C+C+W">Chang Won Lee</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2209.01509v1-abstract-short" style="display: inline;"> Molecular clouds are sites of star formation. Magnetic fields are believed to play an important role in their dynamics and shaping morphology. We aim to study any possible correlation that might exist between the magnetic fields orientation inside the clouds and the magnetic fields at envelope scales and their connection with respect to the observed morphology of the selected clouds. We examine th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.01509v1-abstract-full').style.display = 'inline'; document.getElementById('2209.01509v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.01509v1-abstract-full" style="display: none;"> Molecular clouds are sites of star formation. Magnetic fields are believed to play an important role in their dynamics and shaping morphology. We aim to study any possible correlation that might exist between the magnetic fields orientation inside the clouds and the magnetic fields at envelope scales and their connection with respect to the observed morphology of the selected clouds. We examine the magnetic field orientation towards the clouds L1512, L1523, L1333, L1521E, L1544, L1517, L1780, and L183 using optical and \textit{Planck} polarization observations. We also found the correlation between the ambient magnetic field and core orientations derived using \textit{Astrodendrogram} on the \textit{Herschel} 250 $渭$m data. We find that the magnetic fields derived from optical and \textit{Planck} agree with each other. The derived magnetic fields are aligned along the observed emission of each cloud as seen in \textit{Herschel} 250 $渭$m data. We also find that the relative orientation between the cores and the magnetic fields is random. This lack of correlation may arise due to the fact that the core orientation could also be influenced by the different magnetization within individual clouds at higher densities or the feedback effects which may vary from cloud to cloud. The estimated magnetic field strength and the mass-to-flux ratio suggest that all the clouds are in a magnetically critical state except L1333, L1521E, and L183 where the cloud envelope could be strongly supported by the magnetic field lines. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.01509v1-abstract-full').style.display = 'none'; document.getElementById('2209.01509v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 5 figures and 5 tables; Accepted for publication in MNRAS</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.10608">arXiv:2207.10608</a> <span> [<a href="https://arxiv.org/pdf/2207.10608">pdf</a>, <a href="https://arxiv.org/format/2207.10608">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41535-023-00570-x">10.1038/s41535-023-00570-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Incommensurate charge-stripe correlations in the kagome superconductor CsV$_3$Sb$_{5-x}$Sn$_x$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kautzsch%2C+L">Linus Kautzsch</a>, <a href="/search/?searchtype=author&query=Oey%2C+Y+M">Yuzki M. Oey</a>, <a href="/search/?searchtype=author&query=Li%2C+H">Hong Li</a>, <a href="/search/?searchtype=author&query=Ren%2C+Z">Zheng Ren</a>, <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Ruff%2C+J">Jacob Ruff</a>, <a href="/search/?searchtype=author&query=Wang%2C+Z">Ziqiang Wang</a>, <a href="/search/?searchtype=author&query=Zeljkovic%2C+I">Ilija Zeljkovic</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.10608v1-abstract-short" style="display: inline;"> We track the evolution of charge correlations in the kagome superconductor CsV$_3$Sb$_5$ as its parent, long-ranged charge density order is destabilized. Upon hole-doping doping, interlayer charge correlations rapidly become short-ranged and their periodicity is reduced by half along the interlayer direction. Beyond the peak of the first superconducting dome, the parent charge density wave state v… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10608v1-abstract-full').style.display = 'inline'; document.getElementById('2207.10608v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.10608v1-abstract-full" style="display: none;"> We track the evolution of charge correlations in the kagome superconductor CsV$_3$Sb$_5$ as its parent, long-ranged charge density order is destabilized. Upon hole-doping doping, interlayer charge correlations rapidly become short-ranged and their periodicity is reduced by half along the interlayer direction. Beyond the peak of the first superconducting dome, the parent charge density wave state vanishes and incommensurate, quasi-1D charge correlations are stabilized in its place. These competing, unidirectional charge correlations demonstrate an inherent electronic rotational symmetry breaking in CsV$_3$Sb$_5$, independent of the parent charge density wave state and reveal a complex landscape of charge correlations across the electronic phase diagram of this class of kagome superconductors. Our data suggest an inherent 2$k_f$ charge instability and the phenomenology of competing charge instabilities is reminiscent of what has been noted across several classes of unconventional superconductors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10608v1-abstract-full').style.display = 'none'; document.getElementById('2207.10608v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> npj Quantum Mater. 8, 37 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.07052">arXiv:2207.07052</a> <span> [<a href="https://arxiv.org/pdf/2207.07052">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s44160-022-00096-3">10.1038/s44160-022-00096-3 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Chemical Synthesis and Materials Discovery </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Cheetham%2C+A+K">Anthony K. Cheetham</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wudl%2C+F">Fred Wudl</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.07052v1-abstract-short" style="display: inline;"> Functional materials impact every area of our lives ranging from electronic and computing devices to transportation and health. In this Perspective, we examine the relationship between synthetic discoveries and the scientific breakthroughs that they have enabled. By tracing the development of some important examples, we explore how and why the materials were initially synthesized and how their uti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.07052v1-abstract-full').style.display = 'inline'; document.getElementById('2207.07052v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.07052v1-abstract-full" style="display: none;"> Functional materials impact every area of our lives ranging from electronic and computing devices to transportation and health. In this Perspective, we examine the relationship between synthetic discoveries and the scientific breakthroughs that they have enabled. By tracing the development of some important examples, we explore how and why the materials were initially synthesized and how their utility was subsequently recognised. Three common pathways to materials breakthroughs are identified. In a small number of cases, such as the aluminosilicate zeolite catalyst ZSM-5, an important advance is made by using design principles based upon earlier work. There are also rare cases of breakthroughs that are serendipitous, such as the buckyball and Teflon(R). Most commonly, however, the breakthrough repurposes a compound that is already known and was often made out of curiosity or for a different application. Typically, the synthetic discovery precedes the discovery of functionality by many decades; key examples include conducting polymers, topological insulators and electrodes for lithium-ion batteries. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.07052v1-abstract-full').style.display = 'none'; document.getElementById('2207.07052v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, two figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2206.03473">arXiv:2206.03473</a> <span> [<a href="https://arxiv.org/pdf/2206.03473">pdf</a>, <a href="https://arxiv.org/format/2206.03473">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.106.245401">10.1103/PhysRevB.106.245401 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Engineering Floquet topological phases using elliptically polarized light </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ranjani Seshadri</a>, <a href="/search/?searchtype=author&query=Sen%2C+D">Diptiman Sen</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2206.03473v1-abstract-short" style="display: inline;"> We study a two-dimensional topological system driven out of equilibrium by the application of elliptically polarized light. In particular, we analyze the Bernevig-Hughes-Zhang model when it is perturbed using an elliptically polarized light of frequency $惟$ described in general by a vector potential ${\bf A}(t) = (A_{0x} \cos(惟t), A_{0y} \cos(惟t + 蠁_0))$. (Linear and circular polarizations can be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.03473v1-abstract-full').style.display = 'inline'; document.getElementById('2206.03473v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2206.03473v1-abstract-full" style="display: none;"> We study a two-dimensional topological system driven out of equilibrium by the application of elliptically polarized light. In particular, we analyze the Bernevig-Hughes-Zhang model when it is perturbed using an elliptically polarized light of frequency $惟$ described in general by a vector potential ${\bf A}(t) = (A_{0x} \cos(惟t), A_{0y} \cos(惟t + 蠁_0))$. (Linear and circular polarizations can be obtained as special cases of this general form by appropriately choosing $A_{0x}$, $A_{0y}$, and $蠁_0$). Even for a fixed value of $蠁_0$, we can change the topological character of the system by changing the ratio of the $x$ and $y$ components of the drive. We therefore find a rich topological phase diagram as a function of $A_{0x}$, $A_{0y}$ and $蠁_0$. In each of these phases, the topological invariant given by the Chern number is consistent with the number of spin-polarized states present at the edges of a nanoribbon. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2206.03473v1-abstract-full').style.display = 'none'; document.getElementById('2206.03473v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 June, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2205.06317">arXiv:2205.06317</a> <span> [<a href="https://arxiv.org/pdf/2205.06317">pdf</a>, <a href="https://arxiv.org/format/2205.06317">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.6.074802">10.1103/PhysRevMaterials.6.074802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Tuning charge-density wave order and superconductivity in the kagome metals KV$_3$Sb$_{5-x}$Sn$_x$ and RbV$_3$Sb$_{5-x}$Sn$_x$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Oey%2C+Y+M">Yuzki M. Oey</a>, <a href="/search/?searchtype=author&query=Kaboudvand%2C+F">Farnaz Kaboudvand</a>, <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2205.06317v1-abstract-short" style="display: inline;"> The family of AV$_3$Sb$_5$ (A = K, Rb, Cs) kagome metals exhibit charge density wave (CDW) order, proposed to be chiral, followed by a lower temperature superconducting state. Recent studies have proposed the importance of band structure saddle points proximal to the Fermi energy in governing these two transitions. Here we show the effects of hole-doping achieved via chemical substitution of Sn fo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.06317v1-abstract-full').style.display = 'inline'; document.getElementById('2205.06317v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2205.06317v1-abstract-full" style="display: none;"> The family of AV$_3$Sb$_5$ (A = K, Rb, Cs) kagome metals exhibit charge density wave (CDW) order, proposed to be chiral, followed by a lower temperature superconducting state. Recent studies have proposed the importance of band structure saddle points proximal to the Fermi energy in governing these two transitions. Here we show the effects of hole-doping achieved via chemical substitution of Sn for Sb on the CDW and superconducting states in both KV$_3$Sb$_5$ and RbV$_3$Sb$_5$, and generate a phase diagram. Hole-doping lifts the $螕$ pocket and van Hove singularities (vHs) toward $E_F$ causing the superconducting $T_C$ in both systems to increase to about 4.5 K, while rapidly suppressing the CDW state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2205.06317v1-abstract-full').style.display = 'none'; document.getElementById('2205.06317v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.11514">arXiv:2201.11514</a> <span> [<a href="https://arxiv.org/pdf/2201.11514">pdf</a>, <a href="https://arxiv.org/format/2201.11514">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.21468/SciPostPhys.12.6.197">10.21468/SciPostPhys.12.6.197 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Josephson junctions of topological nodal superconductors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ranjani Seshadri</a>, <a href="/search/?searchtype=author&query=Khodas%2C+M">Maxim Khodas</a>, <a href="/search/?searchtype=author&query=Meidan%2C+D">Dganit Meidan</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.11514v1-abstract-short" style="display: inline;"> Transition metal dichalcogenides (TMDs) offer a unique platform to study unconventional superconductivity, owing to the presence of strong spin-orbit coupling and a remarkable stability to an in-plane magnetic field. A recent study found that when an in-plane field applied to a superconducting monolayer TMD is increased beyond the Pauli critical limit, a quantum phase transition occurs into a topo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.11514v1-abstract-full').style.display = 'inline'; document.getElementById('2201.11514v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.11514v1-abstract-full" style="display: none;"> Transition metal dichalcogenides (TMDs) offer a unique platform to study unconventional superconductivity, owing to the presence of strong spin-orbit coupling and a remarkable stability to an in-plane magnetic field. A recent study found that when an in-plane field applied to a superconducting monolayer TMD is increased beyond the Pauli critical limit, a quantum phase transition occurs into a topological nodal superconducting phase which hosts Majorana flat bands. We study the current-phase relation of this nodal superconductor in a Josephson junction geometry. We find that the nodal superconductivity is associated with an energy-phase relation that depends on the momentum transverse to the current direction, with a $4蟺$ periodicity in between pairs of nodal points. We interpret this response as a result of a series of quantum phase transitions, driven by the transverse momentum, which separate a topological trivial phase and two distinct topologically non-trivial phases characterized by different winding invariants. This analysis sheds light on the stability of the Majorana flat bands to symmetry-breaking perturbations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.11514v1-abstract-full').style.display = 'none'; document.getElementById('2201.11514v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> SciPost Phys. 12, 197 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2112.14748">arXiv:2112.14748</a> <span> [<a href="https://arxiv.org/pdf/2112.14748">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="General Economics">econ.GN</span> </div> </div> <p class="title is-5 mathjax"> Adaptive Transit Design: Optimizing Fixed and Demand Responsive Multi-Modal Transportation via Continuous Approximation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Calabro%27%2C+G">Giovanni Calabro'</a>, <a href="/search/?searchtype=author&query=Araldo%2C+A">Andrea Araldo</a>, <a href="/search/?searchtype=author&query=Oh%2C+S">Simon Oh</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Inturri%2C+G">Giuseppe Inturri</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2112.14748v2-abstract-short" style="display: inline;"> In most cities, transit consists solely of fixed-route transportation, whence the inherent limited Quality of Service for travellers in suburban areas and during off-peak periods. On the other hand, completely replacing fixed-route (FR) with demand-responsive (DR) transit would imply a huge operational cost. It is still unclear how to integrate DR transportation into current transit systems to tak… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.14748v2-abstract-full').style.display = 'inline'; document.getElementById('2112.14748v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2112.14748v2-abstract-full" style="display: none;"> In most cities, transit consists solely of fixed-route transportation, whence the inherent limited Quality of Service for travellers in suburban areas and during off-peak periods. On the other hand, completely replacing fixed-route (FR) with demand-responsive (DR) transit would imply a huge operational cost. It is still unclear how to integrate DR transportation into current transit systems to take full advantage of it. We propose a Continuous Approximation model of a transit system that gets the best from fixed-route and DR transportation. Our model allows deciding whether to deploy a FR or a DR feeder, in each sub-region of an urban conurbation and each time of day, and to redesign the line frequencies and the stop spacing of the main trunk service. Since such a transit design can adapt to the spatial and temporal variation of the demand, we call it Adaptive Transit. Numerical results show that, with respect to conventional transit, Adaptive Transit significantly improves user-related cost, by drastically reducing access time to the main trunk service. Such benefits are particularly remarkable in the suburbs. Moreover, the generalized cost, including agency and user cost, is also reduced. These findings are also confirmed in scenarios with automated vehicles. Our model can assist in planning future-generation transit systems, able to improve urban mobility by appropriately combining fixed and DR transportation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2112.14748v2-abstract-full').style.display = 'none'; document.getElementById('2112.14748v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 December, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">57 pages, 13 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.10912">arXiv:2110.10912</a> <span> [<a href="https://arxiv.org/pdf/2110.10912">pdf</a>, <a href="https://arxiv.org/format/2110.10912">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.6.L041801">10.1103/PhysRevMaterials.6.L041801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fermi level tuning and double-dome superconductivity in the kagome metals CsV$_3$Sb$_{5-x}$Sn$_x$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Oey%2C+Y+M">Yuzki M. Oey</a>, <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Kaboudvand%2C+F">Farnaz Kaboudvand</a>, <a href="/search/?searchtype=author&query=Frassineti%2C+J">Jonathan Frassineti</a>, <a href="/search/?searchtype=author&query=Garcia%2C+E">Erick Garcia</a>, <a href="/search/?searchtype=author&query=Cong%2C+R">Rong Cong</a>, <a href="/search/?searchtype=author&query=Sanna%2C+S">Samuele Sanna</a>, <a href="/search/?searchtype=author&query=Mitrovi%C4%87%2C+V">Vesna Mitrovi膰</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.10912v2-abstract-short" style="display: inline;"> The recently reported \textit{A}V$_3$Sb$_5$ (\textit{A} = K, Rb, Cs) family of kagome metals are candidates for unconventional superconductivity and chiral charge density wave (CDW) order; both potentially arise from nested saddle points in their band structures close to the Fermi energy. Here we use chemical substitution to introduce holes into CsV$_3$Sb$_{5}$ and unveil an unconventionalcoupling… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.10912v2-abstract-full').style.display = 'inline'; document.getElementById('2110.10912v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.10912v2-abstract-full" style="display: none;"> The recently reported \textit{A}V$_3$Sb$_5$ (\textit{A} = K, Rb, Cs) family of kagome metals are candidates for unconventional superconductivity and chiral charge density wave (CDW) order; both potentially arise from nested saddle points in their band structures close to the Fermi energy. Here we use chemical substitution to introduce holes into CsV$_3$Sb$_{5}$ and unveil an unconventionalcoupling of the CDW and superconducting states. Specifically, we generate a phase diagram for CsV$_3$Sb$_{5-x}$Sn$_{x}$ that illustrates the impact of hole-doping the system and lifting the nearest vHs toward and above $E_F$. Superconductivity exhibits a non-monotonic evolution with the introduction of holes, resulting in two "domes" peaked at 3.6\,K and 4.1\,K and the rapid suppression of three-dimensional CDW order. The evolution of CDW and superconducting order is compared with the evolution of the electronic band structure of CsV$_3$Sb$_{5-x}$Sn$_x$, where the complete suppression of superconductivity seemingly coincides with an electron-like band comprised of Sb $p_z$ orbitals pushed above E$_F$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.10912v2-abstract-full').style.display = 'none'; document.getElementById('2110.10912v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physical Review Materials, 6 L041801 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.03208">arXiv:2110.03208</a> <span> [<a href="https://arxiv.org/pdf/2110.03208">pdf</a>, <a href="https://arxiv.org/format/2110.03208">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="History and Philosophy of Physics">physics.hist-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="General Relativity and Quantum Cosmology">gr-qc</span> </div> </div> <p class="title is-5 mathjax"> The Life and Science of Thanu Padmanabhan </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Bagla%2C+J+S">Jasjeet Singh Bagla</a>, <a href="/search/?searchtype=author&query=Bhattacharya%2C+K">Krishnakanta Bhattacharya</a>, <a href="/search/?searchtype=author&query=Chakraborty%2C+S">Sumanta Chakraborty</a>, <a href="/search/?searchtype=author&query=Engineer%2C+S">Sunu Engineer</a>, <a href="/search/?searchtype=author&query=Faraoni%2C+V">Valerio Faraoni</a>, <a href="/search/?searchtype=author&query=Kolekar%2C+S">Sanved Kolekar</a>, <a href="/search/?searchtype=author&query=Kothawala%2C+D">Dawood Kothawala</a>, <a href="/search/?searchtype=author&query=Lochan%2C+K">Kinjalk Lochan</a>, <a href="/search/?searchtype=author&query=Modak%2C+S">Sujoy Modak</a>, <a href="/search/?searchtype=author&query=Nair%2C+V+P">V. Parameswaran Nair</a>, <a href="/search/?searchtype=author&query=Paranjape%2C+A">Aseem Paranjape</a>, <a href="/search/?searchtype=author&query=Parattu%2C+K">Krishnamohan Parattu</a>, <a href="/search/?searchtype=author&query=Rajeev%2C+S+G">Sarada G. Rajeev</a>, <a href="/search/?searchtype=author&query=Majhi%2C+B+R">Bibhas Ranjan Majhi</a>, <a href="/search/?searchtype=author&query=Choudhury%2C+T+R">Tirthankar Roy Choudhury</a>, <a href="/search/?searchtype=author&query=Sami%2C+M">Mohammad Sami</a>, <a href="/search/?searchtype=author&query=Sarkar%2C+S">Sudipta Sarkar</a>, <a href="/search/?searchtype=author&query=Sengupta%2C+S">Sandipan Sengupta</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a>, <a href="/search/?searchtype=author&query=Shankaranarayanan%2C+S">S. Shankaranarayanan</a>, <a href="/search/?searchtype=author&query=Singh%2C+S">Suprit Singh</a>, <a href="/search/?searchtype=author&query=Singh%2C+T+P">Tejinder P. Singh</a>, <a href="/search/?searchtype=author&query=Sriramkumar%2C+L">L. Sriramkumar</a>, <a href="/search/?searchtype=author&query=Yajnik%2C+U">Urjit Yajnik</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.03208v1-abstract-short" style="display: inline;"> Thanu Padmanabhan was a renowned Indian theoretical physicist known for his research in general relativity, cosmology, and quantum gravity. In an extraordinary career spanning forty-two years, he published more than three hundred research articles, wrote ten highly successful technical and popular books, and mentored nearly thirty graduate students and post-doctoral fellows. He is best known for h… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.03208v1-abstract-full').style.display = 'inline'; document.getElementById('2110.03208v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.03208v1-abstract-full" style="display: none;"> Thanu Padmanabhan was a renowned Indian theoretical physicist known for his research in general relativity, cosmology, and quantum gravity. In an extraordinary career spanning forty-two years, he published more than three hundred research articles, wrote ten highly successful technical and popular books, and mentored nearly thirty graduate students and post-doctoral fellows. He is best known for his deep work investigating gravitation as an emergent thermodynamic phenomenon. He was an outstanding teacher, and an indefatigable populariser of science, who travelled very widely to motivate and inspire young students. Paddy, as he was affectionately known, was also a close friend to his students and collaborators, treating them as part of his extended academic family. On September 17, 2021 Paddy passed away very unexpectedly, at the age of sixty-four and at the height of his research career, while serving as a Distinguished Professor at the Inter-University Centre for Astronomy and Astrophysics, Pune. His untimely demise has come as a shock to his family and friends and colleagues. In this article, several of them have come together to pay their tributes and share their fond memories of Paddy. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.03208v1-abstract-full').style.display = 'none'; document.getElementById('2110.03208v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">In Memoriam of Prof. T. Padmanabhan (1957-2021)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.07394">arXiv:2109.07394</a> <span> [<a href="https://arxiv.org/pdf/2109.07394">pdf</a>, <a href="https://arxiv.org/format/2109.07394">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.104.235139">10.1103/PhysRevB.104.235139 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of the electronic properties of topological kagome metals YV$_6$Sn$_6$ and GdV$_6$Sn$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Pokharel%2C+G">Ganesh Pokharel</a>, <a href="/search/?searchtype=author&query=Teicher%2C+S+M+L">Samuel M. L. Teicher</a>, <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Sarte%2C+P+M">Paul M. Sarte</a>, <a href="/search/?searchtype=author&query=Wu%2C+G">Guang Wu</a>, <a href="/search/?searchtype=author&query=Peng%2C+S">Shuting Peng</a>, <a href="/search/?searchtype=author&query=He%2C+J">Junfeng He</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2109.07394v2-abstract-short" style="display: inline;"> The synthesis and characterization of vanadium-based kagome metals YV$_6$Sn$_6$ and GdV$_6$Sn$_6$ are presented. X-ray diffraction, magnetization, magnetotransport, and heat capacity measurements reveal an ideal kagome network of V-ions coordinated by Sn and separated by triangular lattice planes of rare-earth ions. The onset of low-temperature, likely noncollinear, magnetic order of Gd spins is d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.07394v2-abstract-full').style.display = 'inline'; document.getElementById('2109.07394v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.07394v2-abstract-full" style="display: none;"> The synthesis and characterization of vanadium-based kagome metals YV$_6$Sn$_6$ and GdV$_6$Sn$_6$ are presented. X-ray diffraction, magnetization, magnetotransport, and heat capacity measurements reveal an ideal kagome network of V-ions coordinated by Sn and separated by triangular lattice planes of rare-earth ions. The onset of low-temperature, likely noncollinear, magnetic order of Gd spins is detected in GdV$_6$Sn$_6$, while V-ions in both compounds remain nonmagnetic. Density functional theory calculations are presented modeling the band structures of both compounds, which can be classified as $\mathbb{Z}_2$ topological metals in the paramagnetic state. Both compounds exhibit high mobility, multiband transport and present an interesting platform for controlling the interplay between magnetic order associated with the $R$-site sublattice and nontrivial band topology associated with the V-based kagome network. Our results invite future exploration of other $R$V$_6$Sn$_6$ ($R$=rare earth) variants where this interplay can be tuned via $R$-site substitution. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.07394v2-abstract-full').style.display = 'none'; document.getElementById('2109.07394v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">11 pages, 10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 104, 235139 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2108.13776">arXiv:2108.13776</a> <span> [<a href="https://arxiv.org/pdf/2108.13776">pdf</a>, <a href="https://arxiv.org/format/2108.13776">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> History of Ferroelectrics -- A Crystallography Perspective </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Spaldin%2C+N+A">Nicola A. Spaldin</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2108.13776v1-abstract-short" style="display: inline;"> "Underlying the whole treatment is the assumption that the physical properties of a solid are closely related to its structure, and that the first step to understanding the physical properties is to understand the structure." Helen D. Megaw, Preface to Ferroelectricity in Crystals, Methuen & Co Ltd, London, 1957. </span> <span class="abstract-full has-text-grey-dark mathjax" id="2108.13776v1-abstract-full" style="display: none;"> "Underlying the whole treatment is the assumption that the physical properties of a solid are closely related to its structure, and that the first step to understanding the physical properties is to understand the structure." Helen D. Megaw, Preface to Ferroelectricity in Crystals, Methuen & Co Ltd, London, 1957. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2108.13776v1-abstract-full').style.display = 'none'; document.getElementById('2108.13776v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 August, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.02953">arXiv:2107.02953</a> <span> [<a href="https://arxiv.org/pdf/2107.02953">pdf</a>, <a href="https://arxiv.org/format/2107.02953">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.054410">10.1103/PhysRevMaterials.5.054410 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetoentropic mapping and computational modeling of cycloids and skyrmions in the lacunar spinels GaV$_4$S$_8$ and GaV$_4$Se$_8$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Zuo%2C+J+L">Julia L. Zuo</a>, <a href="/search/?searchtype=author&query=Kitchaev%2C+D">Daniil Kitchaev</a>, <a href="/search/?searchtype=author&query=Schueller%2C+E+C">Emily C. Schueller</a>, <a href="/search/?searchtype=author&query=Bocarsly%2C+J+D">Joshua D. Bocarsly</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Van+der+Ven%2C+A">Anton Van der Ven</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.02953v1-abstract-short" style="display: inline;"> We report the feasibility of using magnetoentropic mapping for the rapid identification of magnetic cycloid and skyrmion phases in uniaxial systems, based on the GaV4S8 and GaV4Se8 model skyrmion hosts with easy-axis and easy-plane anisotropies respectively. We show that these measurements can be interpreted with the help of a simple numerical model for the spin Hamiltonian to yield unambiguous as… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.02953v1-abstract-full').style.display = 'inline'; document.getElementById('2107.02953v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.02953v1-abstract-full" style="display: none;"> We report the feasibility of using magnetoentropic mapping for the rapid identification of magnetic cycloid and skyrmion phases in uniaxial systems, based on the GaV4S8 and GaV4Se8 model skyrmion hosts with easy-axis and easy-plane anisotropies respectively. We show that these measurements can be interpreted with the help of a simple numerical model for the spin Hamiltonian to yield unambiguous assignments for both single phase regions and phase boundaries. In the two lacunar spinel chemistries, we obtain excellent agreement between the measured magnetoentropic features and a minimal spin Hamiltonian built on Heisenberg exchange, single-ion anisotropy, and anisotropic Dzyaloshinskii-Moriya interactions. In particular, we identify characteristic high-entropy behavior in the cycloid phase that serves as a precursor to the formation of skyrmions at elevated temperatures and is a readily-measurable signature of this phase transition. Our results demonstrate that rapid magnetoentropic mapping guided by numerical modeling is an effective means of understanding the complex magnetic phase diagrams innate to skyrmion hosts. One notable exception is the observation of an anomalous, low-temperature high-entropy state in the easy-plane system GaV$_4$Se$_8$, which is not captured in the numerical model. Possible origins of this state are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.02953v1-abstract-full').style.display = 'none'; document.getElementById('2107.02953v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 pages and 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 5, 054410 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.14716">arXiv:2105.14716</a> <span> [<a href="https://arxiv.org/pdf/2105.14716">pdf</a>, <a href="https://arxiv.org/format/2105.14716">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Multiagent Systems">cs.MA</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.trc.2021.103195">10.1016/j.trc.2021.103195 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improving the Accuracy and Efficiency of Online Calibration for Simulation-based Dynamic Traffic Assignment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Zhang%2C+H">Haizheng Zhang</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Prakash%2C+A+A">A. Arun Prakash</a>, <a href="/search/?searchtype=author&query=Antoniou%2C+C">Constantinos Antoniou</a>, <a href="/search/?searchtype=author&query=Pereira%2C+F+C">Francisco C. Pereira</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.14716v1-abstract-short" style="display: inline;"> Simulation-based Dynamic Traffic Assignment models have important applications in real-time traffic management and control. The efficacy of these systems rests on the ability to generate accurate estimates and predictions of traffic states, which necessitates online calibration. A widely used solution approach for online calibration is the Extended Kalman Filter (EKF), which -- although appealing… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.14716v1-abstract-full').style.display = 'inline'; document.getElementById('2105.14716v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.14716v1-abstract-full" style="display: none;"> Simulation-based Dynamic Traffic Assignment models have important applications in real-time traffic management and control. The efficacy of these systems rests on the ability to generate accurate estimates and predictions of traffic states, which necessitates online calibration. A widely used solution approach for online calibration is the Extended Kalman Filter (EKF), which -- although appealing in its flexibility to incorporate any class of parameters and measurements -- poses several challenges with regard to calibration accuracy and scalability, especially in congested situations for large-scale networks. This paper addresses these issues in turn so as to improve the accuracy and efficiency of EKF-based online calibration approaches for large and congested networks. First, the concept of state augmentation is revisited to handle violations of the Markovian assumption typically implicit in online applications of the EKF. Second, a method based on graph-coloring is proposed to operationalize the partitioned finite-difference approach that enhances scalability of the gradient computations. Several synthetic experiments and a real world case study demonstrate that application of the proposed approaches yields improvements in terms of both prediction accuracy and computational performance. The work has applications in real-world deployments of simulation-based dynamic traffic assignment systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.14716v1-abstract-full').style.display = 'none'; document.getElementById('2105.14716v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 31 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">26 pages, 15 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Transportation Research Part C: Emerging Technologies Volume 128, July 2021, 103195 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2105.06629">arXiv:2105.06629</a> <span> [<a href="https://arxiv.org/pdf/2105.06629">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mesoscale and Nanoscale Physics">cond-mat.mes-hall</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.064417">10.1103/PhysRevMaterials.5.064417 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Understanding Magnetic Phase Coexistence in Ru$_2$Mn$_{1-x}$Fe$_x$Sn Heusler Alloys: A Neutron Scattering, Thermodynamic, and Phenomenological Analysis </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=McCalla%2C+E">Eric McCalla</a>, <a href="/search/?searchtype=author&query=Levin%2C+E+E">Emily E. Levin</a>, <a href="/search/?searchtype=author&query=Douglas%2C+J+E">Jason E. Douglas</a>, <a href="/search/?searchtype=author&query=Barker%2C+J+G">John G. Barker</a>, <a href="/search/?searchtype=author&query=Frontzek%2C+M">Matthias Frontzek</a>, <a href="/search/?searchtype=author&query=Tian%2C+W">Wei Tian</a>, <a href="/search/?searchtype=author&query=Fernandes%2C+R+M">Rafael M. Fernandes</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Leighton%2C+C">Chris Leighton</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2105.06629v1-abstract-short" style="display: inline;"> The random substitutional solid solution between the antiferromagnetic (AFM) full-Heusler alloy Ru$_2$MnSn and the ferromagnetic (FM) full-Heusler alloy Ru$_2$FeSn provides a rare opportunity to study FM-AFM phase competition in a near-lattice-matched, cubic system, with full solubility. At intermediate $x$ in Ru$_2$Mn$_{1-x}$Fe$_x$Sn this system displays suppressed magnetic ordering temperatures,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.06629v1-abstract-full').style.display = 'inline'; document.getElementById('2105.06629v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2105.06629v1-abstract-full" style="display: none;"> The random substitutional solid solution between the antiferromagnetic (AFM) full-Heusler alloy Ru$_2$MnSn and the ferromagnetic (FM) full-Heusler alloy Ru$_2$FeSn provides a rare opportunity to study FM-AFM phase competition in a near-lattice-matched, cubic system, with full solubility. At intermediate $x$ in Ru$_2$Mn$_{1-x}$Fe$_x$Sn this system displays suppressed magnetic ordering temperatures, spatially coexisting FM and AFM order, and strong coercivity enhancement, despite rigorous chemical homogeneity. Here, we construct the most detailed temperature- and $x$-dependent understanding of the magnetic phase competition and coexistence in this system to date, combining wide-temperature-range neutron diffraction and small-angle neutron scattering with magnetometry and specific heat measurements on thoroughly characterized polycrystals. A complete magnetic phase diagram is generated, showing FM-AFM coexistence between $x \approx 0.30$ and $x \approx 0.70$. Important new insight is gained from the extracted length scales for magnetic phase coexistence (25-100 nm), the relative magnetic volume fractions and ordering temperatures, in addition to remarkable $x$-dependent trends in magnetic and electronic contributions to specific heat. An unusual feature in the magnetic phase diagram (an intermediate FM phase) is also shown to arise from an extrinsic effect related to a minor Ru-rich secondary phase. The established magnetic phase diagram is then discussed with the aid of phenomenological modeling, clarifying the nature of the mesoscale phase coexistence with respect to the understanding of disordered Heisenberg models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2105.06629v1-abstract-full').style.display = 'none'; document.getElementById('2105.06629v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">10 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 5, 064417 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2104.07230">arXiv:2104.07230</a> <span> [<a href="https://arxiv.org/pdf/2104.07230">pdf</a>, <a href="https://arxiv.org/format/2104.07230">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevX.11.041030">10.1103/PhysRevX.11.041030 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Fermi surface mapping and the nature of charge density wave order in the kagome superconductor CsV$_3$Sb$_5$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Teicher%2C+S+M+L">Samuel M. L. Teicher</a>, <a href="/search/?searchtype=author&query=Kautzsch%2C+L">Linus Kautzsch</a>, <a href="/search/?searchtype=author&query=Sarte%2C+P+M">Paul M. Sarte</a>, <a href="/search/?searchtype=author&query=Ratcliff%2C+N">Noah Ratcliff</a>, <a href="/search/?searchtype=author&query=Harter%2C+J">John Harter</a>, <a href="/search/?searchtype=author&query=Ruff%2C+J+P+C">Jacob P. C. Ruff</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2104.07230v3-abstract-short" style="display: inline;"> The recently discovered family of AV$_3$Sb$_5$ (A: K, Rb Cs) kagome metals possess a unique combination of nontrivial band topology, superconducting ground states, and signatures of electron correlations manifest via competing charge density wave order. Little is understood regarding the nature of the charge density wave (CDW) instability inherent to these compounds and the potential correlation w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.07230v3-abstract-full').style.display = 'inline'; document.getElementById('2104.07230v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2104.07230v3-abstract-full" style="display: none;"> The recently discovered family of AV$_3$Sb$_5$ (A: K, Rb Cs) kagome metals possess a unique combination of nontrivial band topology, superconducting ground states, and signatures of electron correlations manifest via competing charge density wave order. Little is understood regarding the nature of the charge density wave (CDW) instability inherent to these compounds and the potential correlation with the accompanying onset of a large anomalous Hall response. To understand the impact of the CDW order on the electronic structure in these systems, we present quantum oscillation measurements on single crystals of CsV$_3$Sb$_5$. Our data provides direct evidence that the CDW invokes a substantial reconstruction of the Fermi surface pockets associated with the vanadium orbitals and the kagome lattice framework. In conjunction with density functional theory modeling, we are able to identify split oscillation frequencies originating from reconstructed pockets built from vanadium orbitals and Dirac-like bands. Complementary diffraction measurements are further able to demonstrate that the CDW instability has a correlated phasing between neighboring V$_3$Sb$_5$ planes. These results provide critical insights into the underlying CDW instability in AV$_3$Sb$_5$ kagome metals and support minimal models of CDW order arising from within the vanadium-based kagome lattice. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2104.07230v3-abstract-full').style.display = 'none'; document.getElementById('2104.07230v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 April, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 9 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.01773">arXiv:2101.01773</a> <span> [<a href="https://arxiv.org/pdf/2101.01773">pdf</a>, <a href="https://arxiv.org/format/2101.01773">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevResearch.4.023029">10.1103/PhysRevResearch.4.023029 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Learning the Crystal Structure Genome for Property Classification </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Wang%2C+Y">Yiqun Wang</a>, <a href="/search/?searchtype=author&query=Zhang%2C+X">Xiao-Jie Zhang</a>, <a href="/search/?searchtype=author&query=Xia%2C+F">Fei Xia</a>, <a href="/search/?searchtype=author&query=Olivetti%2C+E+A">Elsa A. Olivetti</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Rondinelli%2C+J+M">James M. Rondinelli</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.01773v2-abstract-short" style="display: inline;"> Materials property predictions have improved from advances in machine learning algorithms, delivering materials discoveries and novel insights through data-driven models of structure-property relationships. Nearly all available models rely on featurization of materials composition, however, whether the exclusive use of structural knowledge in such models has the capacity to make comparable predict… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.01773v2-abstract-full').style.display = 'inline'; document.getElementById('2101.01773v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.01773v2-abstract-full" style="display: none;"> Materials property predictions have improved from advances in machine learning algorithms, delivering materials discoveries and novel insights through data-driven models of structure-property relationships. Nearly all available models rely on featurization of materials composition, however, whether the exclusive use of structural knowledge in such models has the capacity to make comparable predictions remains unknown. Here we employ a deep neural network model to decode structure-property relationships in crystalline materials without explicitly considering chemical compositions. The focus is on classification of crystal systems, mechanical elasticity, electronic band gap, and phase stability. Our model utilizes a three-dimensional (3D) momentum space representation of structure from elastic x-ray scattering theory that exhibits rotation and permutation invariance. We perform novel ablation studies to help interpret the model performance by perturbing the physically meaningful input features (i.e., the diffraction patterns) instead of tuning the architecture of the learning model as in conventional ablation methods. We find that the spatial symmetry of the 3D diffraction patterns, which reflects crystalline symmetry operations, is more important than the diffraction intensities contained within for the model to make a successful classification. Our work showcases the potential of using statistical learning models to help understand materials physics, rather than performing predictive and generative tasks as in most materials informatics research. We also argue that learning the crystal structure genome in a chemistry-agnostic manner demonstrates that some crystal structures inherently host high propensities for optimal materials properties, which enables the decoupling of structure and composition for future codesign of multifunctionality. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.01773v2-abstract-full').style.display = 'none'; document.getElementById('2101.01773v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 April, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages, 6 Figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 4, 023029 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.00669">arXiv:2101.00669</a> <span> [<a href="https://arxiv.org/pdf/2101.00669">pdf</a>, <a href="https://arxiv.org/format/2101.00669">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="General Economics">econ.GN</span> </div> </div> <p class="title is-5 mathjax"> Market Design for Tradable Mobility Credits </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Chen%2C+S">Siyu Chen</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Azevedo%2C+C+L">Carlos Lima Azevedo</a>, <a href="/search/?searchtype=author&query=Akkinepally%2C+A+P">Arun P. Akkinepally</a>, <a href="/search/?searchtype=author&query=Liu%2C+R">Renming Liu</a>, <a href="/search/?searchtype=author&query=Araldo%2C+A">Andrea Araldo</a>, <a href="/search/?searchtype=author&query=Jiang%2C+Y">Yu Jiang</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M+E">Moshe E. Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2101.00669v2-abstract-short" style="display: inline;"> Tradable mobility credit (TMC) schemes are an approach to travel demand management that have received significant attention in recent years. This paper proposes and analyzes alternative market models for a TMC system -- focusing on market design aspects such as allocation/expiration of tokens, rules governing trading, transaction fees, and regulator intervention -- and develops a methodology to ex… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.00669v2-abstract-full').style.display = 'inline'; document.getElementById('2101.00669v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.00669v2-abstract-full" style="display: none;"> Tradable mobility credit (TMC) schemes are an approach to travel demand management that have received significant attention in recent years. This paper proposes and analyzes alternative market models for a TMC system -- focusing on market design aspects such as allocation/expiration of tokens, rules governing trading, transaction fees, and regulator intervention -- and develops a methodology to explicitly model the dis-aggregate behavior of individuals within the market. Extensive simulation experiments are conducted within a combined mode and departure time context for the morning commute problem to compare the performance of the alternative designs relative to congestion pricing and a no-control scenario. The simulation experiments employ a day-to-day assignment framework wherein transportation demand is modeled using a logit-mixture model with income effects and supply is modeled using a standard bottleneck model. The results indicate that small fixed transaction fees can effectively mitigate undesirable behavior in the market without a significant loss in efficiency (total welfare) whereas proportional transaction fees are less effective both in terms of efficiency and in avoiding undesirable market behavior. Further, an allocation of tokens in continuous time can be beneficial in dealing with non-recurrent events and avoiding concentrated trading activity. In the presence of income effects, despite small fixed transaction fees, the TMC system yields a marginally higher social welfare than congestion pricing while attaining revenue neutrality. Further, it is more robust in the presence of forecasting errors and non-recurrent events due to the adaptiveness of the market. Finally, as expected, the TMC scheme is more equitable (when revenues from congestion pricing are not redistributed) although it is not guaranteed to be Pareto-improving when tokens are distributed equally. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.00669v2-abstract-full').style.display = 'none'; document.getElementById('2101.00669v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 3 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2012.09097">arXiv:2012.09097</a> <span> [<a href="https://arxiv.org/pdf/2012.09097">pdf</a>, <a href="https://arxiv.org/format/2012.09097">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevMaterials.5.034801">10.1103/PhysRevMaterials.5.034801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Superconductivity in the $\mathbb{Z}_2$ kagome metal KV$_3$Sb$_5$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Sarte%2C+P+M">Paul M. Sarte</a>, <a href="/search/?searchtype=author&query=Kenney%2C+E">Eric Kenney</a>, <a href="/search/?searchtype=author&query=Teicher%2C+S+M+L">Samuel M. L. Teicher</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Graf%2C+M+J">Michael J. Graf</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2012.09097v2-abstract-short" style="display: inline;"> Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal KV$_3$Sb$_5$. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below $T_c = 0.93$K, and density functional theory (DFT) calculations further characterize the normal state as a $\mathbb{Z}_2$ topological metal. Our results demonstrate that the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.09097v2-abstract-full').style.display = 'inline'; document.getElementById('2012.09097v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.09097v2-abstract-full" style="display: none;"> Here we report the observation of bulk superconductivity in single crystals of the two-dimensional kagome metal KV$_3$Sb$_5$. Magnetic susceptibility, resistivity, and heat capacity measurements reveal superconductivity below $T_c = 0.93$K, and density functional theory (DFT) calculations further characterize the normal state as a $\mathbb{Z}_2$ topological metal. Our results demonstrate that the recent observation of superconductivity within the related kagome metal CsV$_3$Sb$_5$ is likely a common feature across the AV$_3$Sb$_5$ (A: K, Rb, Cs) family of compounds and establish them as a rich arena for studying the interplay between bulk superconductivity, topological surface states, and likely electronic density wave order in an exfoliable kagome lattice. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.09097v2-abstract-full').style.display = 'none'; document.getElementById('2012.09097v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 5, 034801 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.07673">arXiv:2011.07673</a> <span> [<a href="https://arxiv.org/pdf/2011.07673">pdf</a>, <a href="https://arxiv.org/format/2011.07673">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Multiagent Systems">cs.MA</span> </div> </div> <p class="title is-5 mathjax"> Spatiotemporal Characteristics of Ride-sourcing Operation in Urban Area </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Oh%2C+S">Simon Oh</a>, <a href="/search/?searchtype=author&query=Kondor%2C+D">Daniel Kondor</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Zhou%2C+M">Meng Zhou</a>, <a href="/search/?searchtype=author&query=Le%2C+D">Diem-Trinh Le</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.07673v1-abstract-short" style="display: inline;"> The emergence of ride-sourcing platforms has brought an innovative alternative in transportation, radically changed travel behaviors, and suggested new directions for transportation planners and operators. This paper provides an exploratory analysis on the operations of a ride-sourcing service using large-scale data on service performance. Observations over multiple days in Singapore suggest repro… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.07673v1-abstract-full').style.display = 'inline'; document.getElementById('2011.07673v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.07673v1-abstract-full" style="display: none;"> The emergence of ride-sourcing platforms has brought an innovative alternative in transportation, radically changed travel behaviors, and suggested new directions for transportation planners and operators. This paper provides an exploratory analysis on the operations of a ride-sourcing service using large-scale data on service performance. Observations over multiple days in Singapore suggest reproducible demand patterns and provide empirical estimates of fleet operations over time and space. During peak periods, we observe significant increases in the service rate along with surge price multipliers. We perform an in-depth analysis of fleet utilization rates and are able to explain daily patterns based on drivers' behavior by involving the number of shifts, shift duration, and shift start and end time choices. We also evaluate metrics of user experience, namely waiting and travel time distribution, and explain our empirical findings with distance metrics from driver trajectory analysis and congestion patterns. Our results of empirical observations on actual service in Singapore can help to understand the spatiotemporal characteristics of ride-sourcing services and provide important insights for transportation planning and operations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.07673v1-abstract-full').style.display = 'none'; document.getElementById('2011.07673v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 11 figures, 5 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.06745">arXiv:2011.06745</a> <span> [<a href="https://arxiv.org/pdf/2011.06745">pdf</a>, <a href="https://arxiv.org/format/2011.06745">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Applied Physics">physics.app-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.125.247002">10.1103/PhysRevLett.125.247002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> CsV$_3$Sb$_5$: a $\mathbb{Z}_2$ topological kagome metal with a superconducting ground state </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/?searchtype=author&query=Teicher%2C+S+M+L">Samuel M. L. Teicher</a>, <a href="/search/?searchtype=author&query=Hu%2C+Y">Yong Hu</a>, <a href="/search/?searchtype=author&query=Zuo%2C+J+L">Julia L. Zuo</a>, <a href="/search/?searchtype=author&query=Sarte%2C+P+M">Paul M. Sarte</a>, <a href="/search/?searchtype=author&query=Schueller%2C+E+C">Emily C. Schueller</a>, <a href="/search/?searchtype=author&query=Abeykoon%2C+A+M+M">A. M. Milinda Abeykoon</a>, <a href="/search/?searchtype=author&query=Krogstad%2C+M+J">Matthew J. Krogstad</a>, <a href="/search/?searchtype=author&query=Rosenkranz%2C+S">Stefan Rosenkranz</a>, <a href="/search/?searchtype=author&query=Osborn%2C+R">Raymond Osborn</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Balents%2C+L">Leon Balents</a>, <a href="/search/?searchtype=author&query=He%2C+J">Junfeng He</a>, <a href="/search/?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.06745v1-abstract-short" style="display: inline;"> Recently discovered alongside its sister compounds KV$_3$Sb$_5$ and RbV$_3$Sb$_5$, CsV$_3$Sb$_5$ crystallizes with an ideal kagome network of vanadium and antimonene layers separated by alkali metal ions. This work presents the electronic properties of CsV$_3$Sb$_5$, demonstrating bulk superconductivity in single crystals with a T$_{c} = 2.5$K. The normal state electronic structure is studied via… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.06745v1-abstract-full').style.display = 'inline'; document.getElementById('2011.06745v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.06745v1-abstract-full" style="display: none;"> Recently discovered alongside its sister compounds KV$_3$Sb$_5$ and RbV$_3$Sb$_5$, CsV$_3$Sb$_5$ crystallizes with an ideal kagome network of vanadium and antimonene layers separated by alkali metal ions. This work presents the electronic properties of CsV$_3$Sb$_5$, demonstrating bulk superconductivity in single crystals with a T$_{c} = 2.5$K. The normal state electronic structure is studied via angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT), which categorize CsV$_3$Sb$_5$ as a $\mathbb{Z}_2$ topological metal. Multiple protected Dirac crossings are predicted in close proximity to the Fermi level ($E_F$), and signatures of normal state correlation effects are also suggested by a high temperature charge density wave-like instability. The implications for the formation of unconventional superconductivity in this material are discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.06745v1-abstract-full').style.display = 'none'; document.getElementById('2011.06745v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 12 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.05092">arXiv:2011.05092</a> <span> [<a href="https://arxiv.org/pdf/2011.05092">pdf</a>, <a href="https://arxiv.org/format/2011.05092">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computers and Society">cs.CY</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Multiagent Systems">cs.MA</span> </div> </div> <p class="title is-5 mathjax"> Network Impacts of Automated Mobility-on-Demand: A Macroscopic Fundamental Diagram Perspective </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Oh%2C+S">Simon Oh</a>, <a href="/search/?searchtype=author&query=Lentzakis%2C+A+F">Antonis F. Lentzakis</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.05092v1-abstract-short" style="display: inline;"> Technological advancements have brought increasing attention to Automated Mobility on Demand (AMOD) as a promising solution that may improve future urban mobility. During the last decade, extensive research has been conducted on the design and evaluation of AMOD systems using simulation models. This paper adds to this growing body of literature by investigating the network impacts of AMOD through… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.05092v1-abstract-full').style.display = 'inline'; document.getElementById('2011.05092v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.05092v1-abstract-full" style="display: none;"> Technological advancements have brought increasing attention to Automated Mobility on Demand (AMOD) as a promising solution that may improve future urban mobility. During the last decade, extensive research has been conducted on the design and evaluation of AMOD systems using simulation models. This paper adds to this growing body of literature by investigating the network impacts of AMOD through high-fidelity activity- and agent-based traffic simulation, including detailed models of AMOD fleet operations. Through scenario simulations of the entire island of Singapore, we explore network traffic dynamics by employing the concept of the Macroscopic Fundamental Diagram (MFD). Taking into account the spatial variability of density, we are able to capture the hysteresis loops, which inevitably form in a network of this size. Model estimation results at both the vehicle and passenger flow level are documented. Environmental impacts including energy and emissions are also discussed. Findings from the case study of Singapore suggest that the introduction of AMOD may bring about significant impacts on network performance in terms of increased VKT, additional travel delay and energy consumption, while reducing vehicle emissions, with respect to the baseline. Despite the increase in network congestion, production of passenger flows remains relatively unchanged. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.05092v1-abstract-full').style.display = 'none'; document.getElementById('2011.05092v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">29 pages, 9 figures, 6 tables, submitted to the journal Simulation Modelling Practice and Theory</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.14375">arXiv:2010.14375</a> <span> [<a href="https://arxiv.org/pdf/2010.14375">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Econometrics">econ.EM</span> </div> </div> <p class="title is-5 mathjax"> E-Commerce Delivery Demand Modeling Framework for An Agent-Based Simulation Platform </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Sakai%2C+T">Takanori Sakai</a>, <a href="/search/?searchtype=author&query=Hara%2C+Y">Yusuke Hara</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Alho%2C+A">Andr茅 Alho</a>, <a href="/search/?searchtype=author&query=Hasnine%2C+M+S">Md Sami Hasnine</a>, <a href="/search/?searchtype=author&query=Jing%2C+P">Peiyu Jing</a>, <a href="/search/?searchtype=author&query=Chua%2C+Z">ZhiYuan Chua</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.14375v1-abstract-short" style="display: inline;"> The e-commerce delivery demand has grown rapidly in the past two decades and such trend has accelerated tremendously due to the ongoing coronavirus pandemic. Given the situation, the need for predicting e-commerce delivery demand and evaluating relevant logistics solutions is increasing. However, the existing simulation models for e-commerce delivery demand are still limited and do not consider th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.14375v1-abstract-full').style.display = 'inline'; document.getElementById('2010.14375v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.14375v1-abstract-full" style="display: none;"> The e-commerce delivery demand has grown rapidly in the past two decades and such trend has accelerated tremendously due to the ongoing coronavirus pandemic. Given the situation, the need for predicting e-commerce delivery demand and evaluating relevant logistics solutions is increasing. However, the existing simulation models for e-commerce delivery demand are still limited and do not consider the delivery options and their attributes that shoppers face on e-commerce order placements. We propose a novel modeling framework which jointly predicts the average total value of e-commerce purchase, the purchase amount per transaction, and delivery option choices. The proposed framework can simulate the changes in e-commerce delivery demand attributable to the changes in delivery options. We assume the model parameters based on various sources of relevant information and conduct a demonstrative sensitivity analysis. Furthermore, we have applied the model to the simulation for the Auto-Innovative Prototype city. While the calibration of the model using real-world survey data is required, the result of the analysis highlights the applicability of the proposed framework. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.14375v1-abstract-full').style.display = 'none'; document.getElementById('2010.14375v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 27 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.11585">arXiv:2010.11585</a> <span> [<a href="https://arxiv.org/pdf/2010.11585">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Multiagent Systems">cs.MA</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Systems and Control">eess.SY</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.3390/futuretransp1030034">10.3390/futuretransp1030034 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A simulation-based evaluation of a Cargo-Hitching service for E-commerce using mobility-on-demand vehicles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Alho%2C+A">Andre Alho</a>, <a href="/search/?searchtype=author&query=Sakai%2C+T">Takanori Sakai</a>, <a href="/search/?searchtype=author&query=Oh%2C+S">Simon Oh</a>, <a href="/search/?searchtype=author&query=Cheng%2C+C">Cheng Cheng</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Chong%2C+W+H">Wen Han Chong</a>, <a href="/search/?searchtype=author&query=Hara%2C+Y">Yusuke Hara</a>, <a href="/search/?searchtype=author&query=Caravias%2C+J">Julia Caravias</a>, <a href="/search/?searchtype=author&query=Cheah%2C+L">Lynette Cheah</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M">Moshe Ben-Akiva</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.11585v1-abstract-short" style="display: inline;"> Time-sensitive parcel deliveries, shipments requested for delivery in a day or less, are an increasingly important research subject. It is challenging to deal with these deliveries from a carrier perspective since it entails additional planning constraints, preventing an efficient consolidation of deliveries which is possible when demand is well known in advance. Furthermore, such time-sensitive d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.11585v1-abstract-full').style.display = 'inline'; document.getElementById('2010.11585v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.11585v1-abstract-full" style="display: none;"> Time-sensitive parcel deliveries, shipments requested for delivery in a day or less, are an increasingly important research subject. It is challenging to deal with these deliveries from a carrier perspective since it entails additional planning constraints, preventing an efficient consolidation of deliveries which is possible when demand is well known in advance. Furthermore, such time-sensitive deliveries are requested to a wider spatial scope than retail centers, including homes and offices. Therefore, an increase in such deliveries is considered to exacerbate negative externalities such as congestion and emissions. One of the solutions is to leverage spare capacity in passenger transport modes. This concept is often denominated as cargo-hitching. While there are various possible system designs, it is crucial that such solution does not deteriorate the quality of service of passenger trips. This research aims to evaluate the use of Mobility-On-Demand services to perform same-day parcel deliveries. For this purpose, we use SimMobility, a high-resolution agent-based simulation platform of passenger and freight flows, applied in Singapore. E-commerce demand carrier data are used to characterize simulated parcel delivery demand. Operational scenarios that aim to minimize the adverse effect of fulfilling deliveries with Mobility-On-Demand vehicles on Mobility-On-Demand passenger flows (fulfillment, wait and travel times) are explored. Results indicate that the Mobility-On-Demand services have potential to fulfill a considerable amount of parcel deliveries and decrease freight vehicle traffic and total vehicle-kilometers-travelled without compromising the quality of Mobility On-Demand for passenger travel. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.11585v1-abstract-full').style.display = 'none'; document.getElementById('2010.11585v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages, 4 tables, 7 figures. Submitted to Transportation (Springer)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Future Transp. 2021, 1, 639-656 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.08836">arXiv:2010.08836</a> <span> [<a href="https://arxiv.org/pdf/2010.08836">pdf</a>, <a href="https://arxiv.org/format/2010.08836">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1142/S0218271820501229">10.1142/S0218271820501229 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Imprints of the post recombination dissipation of helical magnetic field on the Cosmic Microwave Background Radiation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Jagannathan%2C+S">Sandhya Jagannathan</a>, <a href="/search/?searchtype=author&query=Sharma%2C+R">Ramkishor Sharma</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.08836v1-abstract-short" style="display: inline;"> Astrophysical magnetic fields decay primarily via two processes namely, ambipolar diffusion and turbulence. Constraints on the strength and the spectral index of non-helical magnetic fields have been derived earlier in the literature through the effect of the above mentioned processes on the Cosmic Microwave Background (CMB) radiation. A helical component of the magnetic field is also produced in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.08836v1-abstract-full').style.display = 'inline'; document.getElementById('2010.08836v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.08836v1-abstract-full" style="display: none;"> Astrophysical magnetic fields decay primarily via two processes namely, ambipolar diffusion and turbulence. Constraints on the strength and the spectral index of non-helical magnetic fields have been derived earlier in the literature through the effect of the above mentioned processes on the Cosmic Microwave Background (CMB) radiation. A helical component of the magnetic field is also produced in various models of magnetogenesis, which can explain larger coherence length magnetic field. In this study, we focus on studying the effects of post recombination decay of maximally helical magnetic fields through ambipolar diffusion and decaying magnetic turbulence and the impact of this decay on CMB. We find that helical magnetic fields lead to changes in the evolution of baryon temperature and ionization fraction which in turn lead to modifications in the CMB temperature and polarization anisotropy. These modifications are different from those arising due to non-helical magnetic fields with the changes dependent on the strength and the spectral index of the magnetic field power spectra. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.08836v1-abstract-full').style.display = 'none'; document.getElementById('2010.08836v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 7 figures, Accepted in IJMPD</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.05089">arXiv:2010.05089</a> <span> [<a href="https://arxiv.org/pdf/2010.05089">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Ferroelastic Hysteresis in Thin Films of Methylammonium Lead Iodide </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Kennard%2C+R+M">Rhys M. Kennard</a>, <a href="/search/?searchtype=author&query=Dahlman%2C+C+J">Clayton J. Dahlman</a>, <a href="/search/?searchtype=author&query=DeCrescent%2C+R+A">Ryan A. DeCrescent</a>, <a href="/search/?searchtype=author&query=Schuller%2C+J+A">Jon A. Schuller</a>, <a href="/search/?searchtype=author&query=Mukherjee%2C+K">Kunal Mukherjee</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ram Seshadri</a>, <a href="/search/?searchtype=author&query=Chabinyc%2C+M+L">Michael L. Chabinyc</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.05089v1-abstract-short" style="display: inline;"> Mechanical strain can modify the structural and electronic properties of methylammonium lead iodide MAPbI3. The consequences of ferroelastic hysteresis, which involves the retention of structural memory upon cycles of deformation, in polycrystalline thin films of MAPbI3 are reported. Repeatedly bent films of MAPbI3 on flexible polyimide substrates were examined using Grazing Incidence Wide-Angle X… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.05089v1-abstract-full').style.display = 'inline'; document.getElementById('2010.05089v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.05089v1-abstract-full" style="display: none;"> Mechanical strain can modify the structural and electronic properties of methylammonium lead iodide MAPbI3. The consequences of ferroelastic hysteresis, which involves the retention of structural memory upon cycles of deformation, in polycrystalline thin films of MAPbI3 are reported. Repeatedly bent films of MAPbI3 on flexible polyimide substrates were examined using Grazing Incidence Wide-Angle X-ray Scattering (GIWAXS) to quantitatively characterize the strain state, populations, and minimum sizes of twin domains. Approximate locations for the coercive stress and saturation on the ferroelastic stress-strain curve are identified, and domains from differently-strained twin sets in the films are found to interact with each other. The presence of specific twin domains is found to correlate to reports of the heterogeneity of strain states with defect content. Long-term stability testing reveals that domain walls are highly immobile over extended periods. Nucleation of new domain walls occurs for specific mechanical strains and correlates closely with degradation of the films. These results help to explain the behavior of ion migration, degradation rate, and photoluminescence in thin films under compressive and tensile strain. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.05089v1-abstract-full').style.display = 'none'; document.getElementById('2010.05089v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">19 pages + References, 9 figures, Supporting Information included</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.06965">arXiv:2009.06965</a> <span> [<a href="https://arxiv.org/pdf/2009.06965">pdf</a>, <a href="https://arxiv.org/format/2009.06965">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Computer Science and Game Theory">cs.GT</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Multiagent Systems">cs.MA</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1080/21680566.2022.2083034">10.1080/21680566.2022.2083034 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Managing network congestion with a tradable credit scheme: a trip-based MFD approach </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Liu%2C+R">Renming Liu</a>, <a href="/search/?searchtype=author&query=Chen%2C+S">Siyu Chen</a>, <a href="/search/?searchtype=author&query=Jiang%2C+Y">Yu Jiang</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Ravi Seshadri</a>, <a href="/search/?searchtype=author&query=Ben-Akiva%2C+M+E">Moshe E. Ben-Akiva</a>, <a href="/search/?searchtype=author&query=Azevedo%2C+C+L">Carlos Lima Azevedo</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.06965v2-abstract-short" style="display: inline;"> This study investigates the efficiency and effectiveness of an area-based tradable credit scheme (TCS) using the trip-based Macroscopic Fundamental Diagram model for the morning commute problem. In the proposed TCS, the regulator distributes initial credits to all travelers and designs a time-varying and trip length specific credit tariff. Credits are traded between travelers and the regulator via… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.06965v2-abstract-full').style.display = 'inline'; document.getElementById('2009.06965v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.06965v2-abstract-full" style="display: none;"> This study investigates the efficiency and effectiveness of an area-based tradable credit scheme (TCS) using the trip-based Macroscopic Fundamental Diagram model for the morning commute problem. In the proposed TCS, the regulator distributes initial credits to all travelers and designs a time-varying and trip length specific credit tariff. Credits are traded between travelers and the regulator via a credit market, and the credit price is determined by the demand and supply of credits. The heterogeneity of travelers is considered in terms of desired arrival time, trip length and departure-time choice preferences. The TCS is incorporated into a day-to-day modelling framework to examine the travelers' learning process, the evolution of network, and the properties of the credit market. The existence of an equilibrium solution and the uniqueness of the credit price at the equilibrium state are established analytically. Furthermore, an open-source simulation framework is developed to validate the analytical properties of the proposed TCS and compare it with alternative control strategies in terms of mobility, network performance, and social welfare. Bayesian optimization is then adopted to optimize the credit toll scheme. The numerical results demonstrate that the proposed TCS outperforms the no-control case and matches the performance of the time-of-day pricing strategy, while maintaining revenue-neutral nature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.06965v2-abstract-full').style.display = 'none'; document.getElementById('2009.06965v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">44 pages, 11 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.07901">arXiv:2006.07901</a> <span> [<a href="https://arxiv.org/pdf/2006.07901">pdf</a>, <a href="https://arxiv.org/format/2006.07901">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Astrophysics of Galaxies">astro-ph.GA</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1093/mnras/staa3281">10.1093/mnras/staa3281 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Implications of baryon-dark matter interaction on IGM temperature and tSZ effect with magnetic field </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Pandey%2C+A+K">Arun Kumar Pandey</a>, <a href="/search/?searchtype=author&query=Malik%2C+S">Sunil Malik</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+T+R">T. R. Seshadri</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.07901v1-abstract-short" style="display: inline;"> We show that the combined effect of cosmic magnetic field and a possible non-standard interaction between baryons and dark matter has interesting consequences on the thermal Sunyaev$-$Zel${'}$dovich (tSZ) effect depending on the temperature and the ionization state of the intergalactic medium. The drag force between the baryons and dark matter due to the relative velocity between them, and their t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07901v1-abstract-full').style.display = 'inline'; document.getElementById('2006.07901v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.07901v1-abstract-full" style="display: none;"> We show that the combined effect of cosmic magnetic field and a possible non-standard interaction between baryons and dark matter has interesting consequences on the thermal Sunyaev$-$Zel${'}$dovich (tSZ) effect depending on the temperature and the ionization state of the intergalactic medium. The drag force between the baryons and dark matter due to the relative velocity between them, and their temperature difference results in heat transfer between these two species. At the same time the ambipolar diffusion and the decaying magnetic turbulence tends to heat up the baryons. This interplay of these two processes give rise to different evolution histories of the thermal and ionization state of the universe and hence influences the CMB spectrum at small scales through the tSZ effect. In this work, we have computed the evolution of the temperature, ionization fraction and the y-parameter of the CMB for different strengths of the magnetic field and the interaction cross-section. We note that an interaction cross-section of $蟽_0=10^{-42}$ m$^{2}$ (with a magnetic field strength of $3.0$ nG) reduces the y-parameter by an order of magnitude as compared to the case with similar strength of magnetic field but where there is no such interaction between the baryons and dark matter. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07901v1-abstract-full').style.display = 'none'; document.getElementById('2006.07901v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">13 pages, 11 figures (comments are welcome)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.00846">arXiv:2006.00846</a> <span> [<a href="https://arxiv.org/pdf/2006.00846">pdf</a>, <a href="https://arxiv.org/ps/2006.00846">ps</a>, <a href="https://arxiv.org/format/2006.00846">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Exactly Solvable and Integrable Systems">nlin.SI</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Mathematical Physics">math-ph</span> </div> </div> <p class="title is-5 mathjax"> Lie Symmetry Analysis and Similarity Solutions for the Jimbo-Miwa Equation and Generalisations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/?searchtype=author&query=Halder%2C+A+K">Amlan K Halder</a>, <a href="/search/?searchtype=author&query=Paliathanasis%2C+A">Andronikos Paliathanasis</a>, <a href="/search/?searchtype=author&query=Seshadri%2C+R">Rajeswari Seshadri</a>, <a href="/search/?searchtype=author&query=Leach%2C+P">Pgl Leach</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.00846v1-abstract-short" style="display: inline;"> We study the Jimbo-Miwa equation and two of its extended forms, as proposed by Wazwaz et al, using Lie's group approach. Interestingly, the travelling-wave solutions for all the three equations are similar. Moreover, we obtain certain new reductions which are completely different for each of the three equations. For example, for one of the extended forms of the Jimbo-Miwa equation, the subsequent… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00846v1-abstract-full').style.display = 'inline'; document.getElementById('2006.00846v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.00846v1-abstract-full" style="display: none;"> We study the Jimbo-Miwa equation and two of its extended forms, as proposed by Wazwaz et al, using Lie's group approach. Interestingly, the travelling-wave solutions for all the three equations are similar. Moreover, we obtain certain new reductions which are completely different for each of the three equations. For example, for one of the extended forms of the Jimbo-Miwa equation, the subsequent reductions leads to a second-order equation with Hypergeometric solutions. In certain reductions, we obtain simpler first-order and linearisable second-order equations, which helps us to construct the analytic solution as a closed-form function. The variation in the nonzero Lie brackets for each of the different forms of the Jimbo-Miwa also presents a different perspective. Finally, singularity analysis is applied in order to determine the integrability of the reduced equations and of the different forms of the Jimbo-Miwa equation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.00846v1-abstract-full').style.display = 'none'; document.getElementById('2006.00846v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 1 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Accepted for publication in International Journal of Nonlinear Sciences and Numerical Simulation (IJNSNS)</span> </p> </li> </ol> <nav class="pagination is-small is-centered breathe-horizontal" role="navigation" aria-label="pagination"> 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