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<button class="button is-small is-link">Go</button> </div> </div> </form> </div> </div> <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/2411.11164">arXiv:2411.11164</a> <span> [<a href="https://arxiv.org/pdf/2411.11164">pdf</a>, <a href="https://arxiv.org/format/2411.11164">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="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> Conformally invariant charge fluctuations in a strange metal </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Guo%2C+X">Xuefei Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+J">Jin Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Hoveyda-Marashi%2C+F">Farzaneh Hoveyda-Marashi</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S+L">Simon L. Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Chaudhuri%2C+D">Dipanjan Chaudhuri</a>, <a href="/search/cond-mat?searchtype=author&query=Kengle%2C+C+S">Caitlin S. Kengle</a>, <a href="/search/cond-mat?searchtype=author&query=Schneeloch%2C+J+A">John A. Schneeloch</a>, <a href="/search/cond-mat?searchtype=author&query=Zhang%2C+R">Ruidan Zhang</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+G">Genda Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Chiang%2C+T">Tai-Chang Chiang</a>, <a href="/search/cond-mat?searchtype=author&query=Tsvelik%2C+A+M">Alexei M. Tsvelik</a>, <a href="/search/cond-mat?searchtype=author&query=Faulkner%2C+T">Thomas Faulkner</a>, <a href="/search/cond-mat?searchtype=author&query=Phillips%2C+P+W">Philip W. Phillips</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</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="2411.11164v1-abstract-short" style="display: inline;"> The strange metal is a peculiar phase of matter in which the electron scattering rate, $蟿^{-1} \sim k_B T/\hbar$, which determines the electrical resistance, is universal across a wide family of materials and determined only by fundamental constants. In 1989, theorists hypothesized that this universality would manifest as scale-invariant behavior in the dynamic charge susceptibility, $蠂''(q,蠅)$. H… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.11164v1-abstract-full').style.display = 'inline'; document.getElementById('2411.11164v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2411.11164v1-abstract-full" style="display: none;"> The strange metal is a peculiar phase of matter in which the electron scattering rate, $蟿^{-1} \sim k_B T/\hbar$, which determines the electrical resistance, is universal across a wide family of materials and determined only by fundamental constants. In 1989, theorists hypothesized that this universality would manifest as scale-invariant behavior in the dynamic charge susceptibility, $蠂''(q,蠅)$. Here, we present momentum-resolved inelastic electron scattering measurements of the strange metal Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ showing that the susceptibility has the scale-invariant form $蠂''(q,蠅) = T^{-谓} f(蠅/T)$, with exponent $谓= 0.93$. We find the response is consistent with conformal invariance, meaning the dynamics may be thought of as occurring on a circle of radius $1/T$ in imaginary time, characterized by conformal dimension $螖= 0.05$. Our study indicates that the strange metal is a universal phenomenon whose properties are not determined by microscopic properties of a particular material. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2411.11164v1-abstract-full').style.display = 'none'; document.getElementById('2411.11164v1-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 November, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">14 pages, 4 figures + supplementary data</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2406.14688">arXiv:2406.14688</a> <span> [<a href="https://arxiv.org/pdf/2406.14688">pdf</a>, <a href="https://arxiv.org/format/2406.14688">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.110.145101">10.1103/PhysRevB.110.145101 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Absence of a bulk charge density wave signature in x-ray measurements of UTe$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kengle%2C+C+S">Caitlin S. Kengle</a>, <a href="/search/cond-mat?searchtype=author&query=Chaudhuri%2C+D">Dipanjan Chaudhuri</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+X">Xuefei Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Johnson%2C+T+A">Thomas A. Johnson</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Simeth%2C+W">Wolfgang Simeth</a>, <a href="/search/cond-mat?searchtype=author&query=Krogstad%2C+M+J">Matthew J. Krogstad</a>, <a href="/search/cond-mat?searchtype=author&query=Islam%2C+Z">Zahir Islam</a>, <a href="/search/cond-mat?searchtype=author&query=Ran%2C+S">Sheng Ran</a>, <a href="/search/cond-mat?searchtype=author&query=Saha%2C+S+R">Shanta R. Saha</a>, <a href="/search/cond-mat?searchtype=author&query=Paglione%2C+J">Johnpierre Paglione</a>, <a href="/search/cond-mat?searchtype=author&query=Butch%2C+N+P">Nicholas P. Butch</a>, <a href="/search/cond-mat?searchtype=author&query=Fradkin%2C+E">Eduardo Fradkin</a>, <a href="/search/cond-mat?searchtype=author&query=Madhavan%2C+V">Vidya Madhavan</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</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="2406.14688v3-abstract-short" style="display: inline;"> The long-sought pair density wave (PDW) is an exotic phase of matter in which charge density wave (CDW) order is intertwined with the amplitude or phase of coexisting, superconducting order \cite{Berg2009,Berg2009b}. Originally predicted to exist in copper-oxides, circumstantial evidence for PDW order now exists in a variety of materials. Recently, scanning tunneling microscopy (STM) studies have… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.14688v3-abstract-full').style.display = 'inline'; document.getElementById('2406.14688v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.14688v3-abstract-full" style="display: none;"> The long-sought pair density wave (PDW) is an exotic phase of matter in which charge density wave (CDW) order is intertwined with the amplitude or phase of coexisting, superconducting order \cite{Berg2009,Berg2009b}. Originally predicted to exist in copper-oxides, circumstantial evidence for PDW order now exists in a variety of materials. Recently, scanning tunneling microscopy (STM) studies have reported evidence for a three-component charge density wave (CDW) at the surface of the heavy-fermion superconductor, UTe$_2$, persisting below its superconducting transition temperature. Here, we use hard x-ray diffraction measurements on crystals of UTe$_2$ at $T = 1.9$ K and $12$ K to search for a bulk signature of this CDW. Using STM measurements as a constraint, we calculate the expected locations of CDW superlattice peaks, and sweep a large volume of reciprocal space in search of a signature. We failed to find any evidence for a CDW near any of the expected superlattice positions in many Brillouin zones. We estimate an upper bound on the CDW lattice distortion of $u_{max} \lesssim 4 \times 10^{-3} \mathrm脜$. Our results suggest that the CDW observed in STM is either purely electronic, somehow lacking a signature in the structural lattice, or is restricted to the material surface. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.14688v3-abstract-full').style.display = 'none'; document.getElementById('2406.14688v3-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 October, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 20 June, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 110, 145101 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2309.10236">arXiv:2309.10236</a> <span> [<a href="https://arxiv.org/pdf/2309.10236">pdf</a>, <a href="https://arxiv.org/format/2309.10236">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.8.034202">10.1103/PhysRevMaterials.8.034202 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Disorder and diffuse scattering in single-chirality (TaSe$_4$)$_2$I crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Christensen%2C+J+A">Jacob A. Christensen</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Qu%2C+K">Kejian Qu</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+J">Jeffrey Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+S">Soyeun Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Lu%2C+Y">Yinchuan Lu</a>, <a href="/search/cond-mat?searchtype=author&query=Zhao%2C+C">Chengxi Zhao</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+J">Jin Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Krogstad%2C+M+J">Matthew J. Krogstad</a>, <a href="/search/cond-mat?searchtype=author&query=Woods%2C+T+J">Toby J. Woods</a>, <a href="/search/cond-mat?searchtype=author&query=Mahmood%2C+F">Fahad Mahmood</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+P+Y">Pinshane Y. Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</a>, <a href="/search/cond-mat?searchtype=author&query=Shoemaker%2C+D+P">Daniel P. Shoemaker</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="2309.10236v5-abstract-short" style="display: inline;"> The quasi-one-dimensional chiral compound (TaSe$_4$)$_2$I has been extensively studied as a prime example of a topological Weyl semimetal. Upon crossing its phase transition temperature $T_\textrm{CDW}$ $\approx$ 263 K, (TaSe$_4$)$_2$I exhibits incommensurate charge density wave (CDW) modulations described by the well-defined propagation vector $\sim$(0.05, 0.05, 0.11), oblique to the TaSe$_4$ cha… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.10236v5-abstract-full').style.display = 'inline'; document.getElementById('2309.10236v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2309.10236v5-abstract-full" style="display: none;"> The quasi-one-dimensional chiral compound (TaSe$_4$)$_2$I has been extensively studied as a prime example of a topological Weyl semimetal. Upon crossing its phase transition temperature $T_\textrm{CDW}$ $\approx$ 263 K, (TaSe$_4$)$_2$I exhibits incommensurate charge density wave (CDW) modulations described by the well-defined propagation vector $\sim$(0.05, 0.05, 0.11), oblique to the TaSe$_4$ chains. Although optical and transport properties greatly depend on chirality, there is no systematic report about chiral domain size for (TaSe$_4$)$_2$I. In this study, our single-crystal scattering refinements reveal a bulk iodine deficiency, and Flack parameter measurements on multiple crystals demonstrate that separate (TaSe$_4$)$_2$I crystals have uniform handedness, supported by direct imaging and helicity dependent THz emission spectroscopy. Our single-crystal X-ray scattering and calculated diffraction patterns identify multiple diffuse features and create a real-space picture of the temperature-dependent (TaSe$_4$)$_2$I crystal structure. The short-range diffuse features are present at room temperature and decrease in intensity as the CDW modulation develops. These transverse displacements, along with electron pinning from the iodine deficiency, help explain why (TaSe$_4$)$_2$I behaves as an electronic semiconductor at temperatures above and below $T_\textrm{CDW}$, despite a metallic band structure calculated from density functional theory of the ideal structure. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2309.10236v5-abstract-full').style.display = 'none'; document.getElementById('2309.10236v5-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> 20 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 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">25 pages, 20 figures, 5 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Materials 8, 034202 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2306.03681">arXiv:2306.03681</a> <span> [<a href="https://arxiv.org/pdf/2306.03681">pdf</a>, <a href="https://arxiv.org/format/2306.03681">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="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> Consistency between reflection M-EELS and optical spectroscopy measurements of the long-wavelength density response of Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Chen%2C+J">Jin Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Guo%2C+X">Xuefei Guo</a>, <a href="/search/cond-mat?searchtype=author&query=Boyd%2C+C">Christian Boyd</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Kengle%2C+C">Caitlin Kengle</a>, <a href="/search/cond-mat?searchtype=author&query=Chaudhuri%2C+D">Dipanjan Chaudhuri</a>, <a href="/search/cond-mat?searchtype=author&query=Hoveyda%2C+F">Farzaneh Hoveyda</a>, <a href="/search/cond-mat?searchtype=author&query=Husain%2C+A">Ali Husain</a>, <a href="/search/cond-mat?searchtype=author&query=Schneeloch%2C+J">John Schneeloch</a>, <a href="/search/cond-mat?searchtype=author&query=Gu%2C+G">Genda Gu</a>, <a href="/search/cond-mat?searchtype=author&query=Phillips%2C+P">Philip Phillips</a>, <a href="/search/cond-mat?searchtype=author&query=Uchoa%2C+B">Bruno Uchoa</a>, <a href="/search/cond-mat?searchtype=author&query=Chiang%2C+T">Tai-Chang Chiang</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</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="2306.03681v3-abstract-short" style="display: inline;"> The density fluctuation spectrum captures many fundamental properties of strange metals. Using momentum-resolved electron energy-loss spectroscopy (M-EELS), we recently showed that the density response of the strange metal Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ (Bi-2212) at large momentum, $q$, exhibits a constant-in-frequency continuum [Mitrano, PNAS $\textbf{115}$, 5392 (2018); Husain, PRX $\textbf{9}$,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.03681v3-abstract-full').style.display = 'inline'; document.getElementById('2306.03681v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2306.03681v3-abstract-full" style="display: none;"> The density fluctuation spectrum captures many fundamental properties of strange metals. Using momentum-resolved electron energy-loss spectroscopy (M-EELS), we recently showed that the density response of the strange metal Bi$_2$Sr$_2$CaCu$_2$O$_{8+x}$ (Bi-2212) at large momentum, $q$, exhibits a constant-in-frequency continuum [Mitrano, PNAS $\textbf{115}$, 5392 (2018); Husain, PRX $\textbf{9}$, 041062 (2019)] reminiscent of the marginal Fermi liquid (MFL) hypothesis of the late 1980s [Varma, PRL $\textbf{63}$, 1996 (1989)]. However, reconciling this observation with infrared (IR) optics experiments, which show a well-defined plasmon excitation at $q \sim 0$, has been challenging. Here we report M-EELS measurements of Bi-2212 using 4$\times$ improved momentum resolution, allowing us to reach the optical limit. For momenta $q<0.04$ r.l.u., the M-EELS data show a plasmon feature that is quantitatively consistent with IR optics. For $q>0.04$ r.l.u., the spectra become incoherent with an MFL-like, constant-in-frequency form. We speculate that, at finite frequency, $蠅$, and nonzero $q$, some attribute of this Planckian metal randomizes the probe electron, causing it to lose information about its own momentum. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2306.03681v3-abstract-full').style.display = 'none'; document.getElementById('2306.03681v3-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 December, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 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, 7 figures; copy editing, improved figure resolution</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.17483">arXiv:2210.17483</a> <span> [<a href="https://arxiv.org/pdf/2210.17483">pdf</a>, <a href="https://arxiv.org/format/2210.17483">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"> Ultrafast x-ray scattering reveals composite amplitude collective mode in the Weyl charge density wave material (TaSe$_4$)$_2$I </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Nguyen%2C+Q+L">Quynh L. Nguyen</a>, <a href="/search/cond-mat?searchtype=author&query=Duncan%2C+R+A">Ryan A. Duncan</a>, <a href="/search/cond-mat?searchtype=author&query=Orenstein%2C+G">Gal Orenstein</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+Y">Yijing Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Krapivin%2C+V">Viktor Krapivin</a>, <a href="/search/cond-mat?searchtype=author&query=de+la+Pena%2C+G">Gilberto de la Pena</a>, <a href="/search/cond-mat?searchtype=author&query=Ornelas-Skarin%2C+C">Chance Ornelas-Skarin</a>, <a href="/search/cond-mat?searchtype=author&query=Reis%2C+D+A">David A. Reis</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Chollet%2C+M">Matthieu Chollet</a>, <a href="/search/cond-mat?searchtype=author&query=Hoffmann%2C+M+C">Matthias C. Hoffmann</a>, <a href="/search/cond-mat?searchtype=author&query=Hurley%2C+M">Matthew Hurley</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+S">Soyeun Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Kirchmann%2C+P+S">Patrick S. Kirchmann</a>, <a href="/search/cond-mat?searchtype=author&query=Kubota%2C+Y">Yuya Kubota</a>, <a href="/search/cond-mat?searchtype=author&query=Mahmood%2C+F">Fahad Mahmood</a>, <a href="/search/cond-mat?searchtype=author&query=Miller%2C+A">Alexander Miller</a>, <a href="/search/cond-mat?searchtype=author&query=Osaka%2C+T">Taito Osaka</a>, <a href="/search/cond-mat?searchtype=author&query=Qu%2C+K">Kejian Qu</a>, <a href="/search/cond-mat?searchtype=author&query=Sato%2C+T">Takahiro Sato</a>, <a href="/search/cond-mat?searchtype=author&query=Shoemaker%2C+D+P">Daniel P. Shoemaker</a>, <a href="/search/cond-mat?searchtype=author&query=Sirica%2C+N">Nicholas Sirica</a>, <a href="/search/cond-mat?searchtype=author&query=Song%2C+S">Sanghoon Song</a>, <a href="/search/cond-mat?searchtype=author&query=Stanton%2C+J">Jade Stanton</a> , et al. (5 additional authors not shown) </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="2210.17483v2-abstract-short" style="display: inline;"> We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe$_4$)$_2$I following photoexcitation with femtosecond infrared laser pulses. From the time-dependent diffraction signal at the CDW sidebands we identify an amplitude mode derived primarily from the transverse acoustic component of the CDW static distortion. The dynamics of this acoustic amplitu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.17483v2-abstract-full').style.display = 'inline'; document.getElementById('2210.17483v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.17483v2-abstract-full" style="display: none;"> We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe$_4$)$_2$I following photoexcitation with femtosecond infrared laser pulses. From the time-dependent diffraction signal at the CDW sidebands we identify an amplitude mode derived primarily from the transverse acoustic component of the CDW static distortion. The dynamics of this acoustic amplitude mode are described well by a model of a displacive excitation, which we interpret as mediated through a coupling to the optical phonon component associated with the tetramerization of the Ta chains. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.17483v2-abstract-full').style.display = 'none'; document.getElementById('2210.17483v2-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.15026">arXiv:2210.15026</a> <span> [<a href="https://arxiv.org/pdf/2210.15026">pdf</a>, <a href="https://arxiv.org/format/2210.15026">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"> Anharmonic multiphonon origin of the valence plasmon in SrTi1-xNbxO3 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kengle%2C+C+S">Caitlin S. Kengle</a>, <a href="/search/cond-mat?searchtype=author&query=Rubeck%2C+S+I">Samantha I. Rubeck</a>, <a href="/search/cond-mat?searchtype=author&query=Rak%2C+M">Melinda Rak</a>, <a href="/search/cond-mat?searchtype=author&query=Chen%2C+J">Jin Chen</a>, <a href="/search/cond-mat?searchtype=author&query=Hoveyda%2C+F">Faren Hoveyda</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Husain%2C+A">Ali Husain</a>, <a href="/search/cond-mat?searchtype=author&query=Mitrano%2C+M">Matteo Mitrano</a>, <a href="/search/cond-mat?searchtype=author&query=Edelman%2C+A">Alexander Edelman</a>, <a href="/search/cond-mat?searchtype=author&query=Littlewood%2C+P">Peter Littlewood</a>, <a href="/search/cond-mat?searchtype=author&query=Chiang%2C+T">Tai-Chang Chiang</a>, <a href="/search/cond-mat?searchtype=author&query=Mahmood%2C+F">Fahad Mahmood</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</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="2210.15026v1-abstract-short" style="display: inline;"> Doped SrTi1-xNbxO3 exhibits superconductivity and a mid-infrared optical response reminiscent of copper-oxide superconductors. Strangely, its plasma frequency, omega_p, increases by a factor of ~3 when cooling from 300 K to 20 K, without any accepted explanation. Here, we present momentum-resolved electron energy loss spectroscopy (M-EELS) measurements of SrTi1-xNbxO3 at nonzero momentum, q. We fi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.15026v1-abstract-full').style.display = 'inline'; document.getElementById('2210.15026v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.15026v1-abstract-full" style="display: none;"> Doped SrTi1-xNbxO3 exhibits superconductivity and a mid-infrared optical response reminiscent of copper-oxide superconductors. Strangely, its plasma frequency, omega_p, increases by a factor of ~3 when cooling from 300 K to 20 K, without any accepted explanation. Here, we present momentum-resolved electron energy loss spectroscopy (M-EELS) measurements of SrTi1-xNbxO3 at nonzero momentum, q. We find that the infrared feature previously identified as a plasmon is present at large q in insulating SrTiO3, where it exhibits the same temperature dependence and may be identified as an anharmonic, multiphonon background. Doping with Nb increases its peak energy and total spectral weight, drawing this background to lower q where it becomes visible in IR optics experiments. We conclude that the "plasmon" in doped SrTi1-xNbxO3 is not a free-carrier mode, but a composite excitation that inherits its unusual properties from the lattice anharmonicity of the insulator. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.15026v1-abstract-full').style.display = 'none'; document.getElementById('2210.15026v1-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> 26 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 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">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/2210.11615">arXiv:2210.11615</a> <span> [<a href="https://arxiv.org/pdf/2210.11615">pdf</a>, <a href="https://arxiv.org/format/2210.11615">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"> A new quasi-one-dimensional transition metal chalcogenide semiconductor (Nb$_4$Se$_{15}$I$_2$)I$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Qu%2C+K">Kejian Qu</a>, <a href="/search/cond-mat?searchtype=author&query=Riedel%2C+Z+W">Zachary W. Riedel</a>, <a href="/search/cond-mat?searchtype=author&query=S%C3%A1nchez-Ram%C3%ADrez%2C+I">Iri谩n S谩nchez-Ram铆rez</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Oh%2C+J">Junseok Oh</a>, <a href="/search/cond-mat?searchtype=author&query=Waite%2C+E+N">Emily N. Waite</a>, <a href="/search/cond-mat?searchtype=author&query=Mason%2C+N">Nadya Mason</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</a>, <a href="/search/cond-mat?searchtype=author&query=Sanz%2C+F+d+J">Fernando de Juan Sanz</a>, <a href="/search/cond-mat?searchtype=author&query=Vergniory%2C+M+G">Maia G. Vergniory</a>, <a href="/search/cond-mat?searchtype=author&query=Shoemaker%2C+D+P">Daniel P. Shoemaker</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="2210.11615v1-abstract-short" style="display: inline;"> The discovery of new low-dimensional transition metal chalcogenides is contributing to the already prosperous family of these materials. In this study, needle-shaped single crystals of a new quasi-one-dimensional material (Nb$_4$Se$_{15}$I$_2$)I$_2$ were grown by chemical vapor transport, and the structure was solved by single crystal X-ray diffraction (XRD). The new structure has one-dimensional… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.11615v1-abstract-full').style.display = 'inline'; document.getElementById('2210.11615v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.11615v1-abstract-full" style="display: none;"> The discovery of new low-dimensional transition metal chalcogenides is contributing to the already prosperous family of these materials. In this study, needle-shaped single crystals of a new quasi-one-dimensional material (Nb$_4$Se$_{15}$I$_2$)I$_2$ were grown by chemical vapor transport, and the structure was solved by single crystal X-ray diffraction (XRD). The new structure has one-dimensional (Nb$_4$Se$_{15}$I$_2$)$_n$ chains along the [101] direction, with two I$^-$ ions per formula unit directly bonded to Nb$^{5+}$. The other two I$^-$ ions are loosely coordinated and intercalate between the chains. Individual chains are chiral, and stack along the $b$ axis in opposing directions, giving space group $P2_1/c$. The phase purity and crystal structure was verified by powder XRD. Density functional theory calculations show (Nb$_4$Se$_{15}$I$_2$)I$_2$ to be a semiconductor with a direct band gap of around 0.6 eV. Resistivity measurements of bulk crystals and micro-patterned devices demonstrate that (Nb$_4$Se$_{15}$I$_2$)I$_2$ has an activation energy of around 0.1 eV, and no anomaly or transition was seen upon cooling. (Nb$_4$Se$_{15}$I$_2$)I$_2$ does not undergo structural phase transformation from room temperature down to 8.2 K, based on cryogenic temperature single crystal XRD. This compound represents a well-characterized and valence-precise member of a diverse family of anisotropic transition metal chalcogenides. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.11615v1-abstract-full').style.display = 'none'; document.getElementById('2210.11615v1-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> 20 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.05699">arXiv:2201.05699</a> <span> [<a href="https://arxiv.org/pdf/2201.05699">pdf</a>, <a href="https://arxiv.org/format/2201.05699">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/10.1002/zaac.202200055">10.1002/zaac.202200055 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Transport and optical properties of the chiral semiconductor Ag3AuSe2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Won%2C+J">Juyeon Won</a>, <a href="/search/cond-mat?searchtype=author&query=Kim%2C+S">Soyeun Kim</a>, <a href="/search/cond-mat?searchtype=author&query=Gutierrez-Amigo%2C+M">Martin Gutierrez-Amigo</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Lee%2C+B">Bumjoo Lee</a>, <a href="/search/cond-mat?searchtype=author&query=Son%2C+J">Jaeseok Son</a>, <a href="/search/cond-mat?searchtype=author&query=Noh%2C+T+W">Tae Won Noh</a>, <a href="/search/cond-mat?searchtype=author&query=Errea%2C+I">Ion Errea</a>, <a href="/search/cond-mat?searchtype=author&query=Vergniory%2C+M+G">Maia G. Vergniory</a>, <a href="/search/cond-mat?searchtype=author&query=Abbamonte%2C+P">Peter Abbamonte</a>, <a href="/search/cond-mat?searchtype=author&query=Mahmood%2C+F">Fahad Mahmood</a>, <a href="/search/cond-mat?searchtype=author&query=Shoemaker%2C+D+P">Daniel P. Shoemaker</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="2201.05699v1-abstract-short" style="display: inline;"> Previous band structure calculations predicted Ag3AuSe2 to be a semiconductor with a band gap of approximately 1 eV. Here, we report single crystal growth of Ag3AuSe2 and its transport and optical properties. Single crystals of Ag3AuSe2 were synthesized by slow-cooling from the melt, and grain sizes were confirmed to be greater than 2 mm using electron backscatter diffraction. Optical and transpor… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.05699v1-abstract-full').style.display = 'inline'; document.getElementById('2201.05699v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.05699v1-abstract-full" style="display: none;"> Previous band structure calculations predicted Ag3AuSe2 to be a semiconductor with a band gap of approximately 1 eV. Here, we report single crystal growth of Ag3AuSe2 and its transport and optical properties. Single crystals of Ag3AuSe2 were synthesized by slow-cooling from the melt, and grain sizes were confirmed to be greater than 2 mm using electron backscatter diffraction. Optical and transport measurements reveal that Ag3AuSe2 is a highly resistive semiconductor with a band gap of and activation energy around 0.3 eV. Our first-principles calculations show that the experimentally-determined band gap lies between the predicted band gaps from GGA and hybrid functionals. We predict band inversion to be possible by applying tensile strain. The sensitivity of the gap to Ag/Au ordering, chemical substitution, and heat treatment merit further investigation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.05699v1-abstract-full').style.display = 'none'; document.getElementById('2201.05699v1-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 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">6 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Z. Anorg. Allg. Chem. 648 [15] e202200055 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.04592">arXiv:2006.04592</a> <span> [<a href="https://arxiv.org/pdf/2006.04592">pdf</a>, <a href="https://arxiv.org/format/2006.04592">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.102.094414">10.1103/PhysRevB.102.094414 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pre-saturation phase in the frustrated ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Landolt%2C+F">F. Landolt</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">S. Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Z. Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Gvasaliya%2C+S">S. Gvasaliya</a>, <a href="/search/cond-mat?searchtype=author&query=Zheludev%2C+A">A. Zheludev</a>, <a href="/search/cond-mat?searchtype=author&query=Mishra%2C+S">S. Mishra</a>, <a href="/search/cond-mat?searchtype=author&query=Sheikin%2C+I">I. Sheikin</a>, <a href="/search/cond-mat?searchtype=author&query=Kr%C3%A4mer%2C+S">S. Kr盲mer</a>, <a href="/search/cond-mat?searchtype=author&query=Horvati%C4%87%2C+M">M. Horvati膰</a>, <a href="/search/cond-mat?searchtype=author&query=Gazizulina%2C+A">A. Gazizulina</a>, <a href="/search/cond-mat?searchtype=author&query=Prokhnenko%2C+O">O. Prokhnenko</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="2006.04592v1-abstract-short" style="display: inline;"> Magnetization, magnetic torque, neutron diffraction and NMR experiments are used to map out the $H$$-$$T$ phase diagram of the prototypical quasi-two-dimensional ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$ in magnetic fields up to 27 T. When the field is applied perpendicular to the axis of magnetic anisotropy, a new magnetic state emerges through a discontinuous transition and persists in a narrow… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.04592v1-abstract-full').style.display = 'inline'; document.getElementById('2006.04592v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.04592v1-abstract-full" style="display: none;"> Magnetization, magnetic torque, neutron diffraction and NMR experiments are used to map out the $H$$-$$T$ phase diagram of the prototypical quasi-two-dimensional ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$ in magnetic fields up to 27 T. When the field is applied perpendicular to the axis of magnetic anisotropy, a new magnetic state emerges through a discontinuous transition and persists in a narrow field range just below saturation. The measured NMR spectra suggest a complex and possibly incommensurate magnetic order in that regime. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.04592v1-abstract-full').style.display = 'none'; document.getElementById('2006.04592v1-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> 8 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">6 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. B 102, 094414 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.01734">arXiv:1908.01734</a> <span> [<a href="https://arxiv.org/pdf/1908.01734">pdf</a>, <a href="https://arxiv.org/format/1908.01734">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/PhysRevResearch.1.033078">10.1103/PhysRevResearch.1.033078 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Presaturation phase with no dipolar order in a quantum ferro-antiferromagnet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bhartiya%2C+V+K">V. K. Bhartiya</a>, <a href="/search/cond-mat?searchtype=author&query=Povarov%2C+K+Y">K. Yu. Povarov</a>, <a href="/search/cond-mat?searchtype=author&query=Blosser%2C+D">D. Blosser</a>, <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">S. Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Z. Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Gvasaliya%2C+S">S. Gvasaliya</a>, <a href="/search/cond-mat?searchtype=author&query=Raymond%2C+S">S. Raymond</a>, <a href="/search/cond-mat?searchtype=author&query=Ressouche%2C+E">E. Ressouche</a>, <a href="/search/cond-mat?searchtype=author&query=Beauvois%2C+K">K. Beauvois</a>, <a href="/search/cond-mat?searchtype=author&query=Xu%2C+J">J. Xu</a>, <a href="/search/cond-mat?searchtype=author&query=Yokaichiya%2C+F">F. Yokaichiya</a>, <a href="/search/cond-mat?searchtype=author&query=Zheludev%2C+A">A. Zheludev</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="1908.01734v3-abstract-short" style="display: inline;"> Magnetization, magnetocaloric, calorimetric, neutron and X-ray diffraction and inelastic neutron scattering measurements are performed on single crystals of BaCdVO(PO$_4$)$_2$. The low-temperature crystal structure is found to be of a lower symmetry than previously assumed. The result is a more complicated model spin Hamiltonian, which we infer from measurements of the spin wave dispersion spectru… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.01734v3-abstract-full').style.display = 'inline'; document.getElementById('1908.01734v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.01734v3-abstract-full" style="display: none;"> Magnetization, magnetocaloric, calorimetric, neutron and X-ray diffraction and inelastic neutron scattering measurements are performed on single crystals of BaCdVO(PO$_4$)$_2$. The low-temperature crystal structure is found to be of a lower symmetry than previously assumed. The result is a more complicated model spin Hamiltonian, which we infer from measurements of the spin wave dispersion spectrum. The main finding is a novel spin state which emerges in high magnetic fields after antiferromagnetic order is terminated at $H_{c1}\simeq 4.0$ T. It is a distinct thermodynamic phase with a well-defined phase boundary at $H_{c2}\simeq 6.5$ T and is clearly separate from the fully saturated phase. Yet, it shows no conventional (dipolar) magnetic long range order. We argue that it is fully consistent with the expectations for a quantum bond-nematic state. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.01734v3-abstract-full').style.display = 'none'; document.getElementById('1908.01734v3-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 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 1, 033078 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1907.09316">arXiv:1907.09316</a> <span> [<a href="https://arxiv.org/pdf/1907.09316">pdf</a>, <a href="https://arxiv.org/format/1907.09316">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/PhysRevResearch.2.012010">10.1103/PhysRevResearch.2.012010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sign-switching of dimer correlations in SrCu$_2$(BO$_3$)$_2$ under hydrostatic pressure </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Stoppel%2C+L">Lena Stoppel</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Zewu Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Gvasaliya%2C+S">Severian Gvasaliya</a>, <a href="/search/cond-mat?searchtype=author&query=Zheludev%2C+A">Andrey Zheludev</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="1907.09316v3-abstract-short" style="display: inline;"> Magnetic and vibrational excitations in SrCu$_2$(BO$_3$)$_2$ are studied using Raman spectroscopy at hydrostatic pressures up to 34 kbar and temperatures down to 2.6 K. The frequency of a particular optical phonon, the so-called pantograph mode, shows a very strong anomalous temperature dependence below about 40 K. We link the magnitude of the effect to the magnetic exchange energy on the dimer bo… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.09316v3-abstract-full').style.display = 'inline'; document.getElementById('1907.09316v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1907.09316v3-abstract-full" style="display: none;"> Magnetic and vibrational excitations in SrCu$_2$(BO$_3$)$_2$ are studied using Raman spectroscopy at hydrostatic pressures up to 34 kbar and temperatures down to 2.6 K. The frequency of a particular optical phonon, the so-called pantograph mode, shows a very strong anomalous temperature dependence below about 40 K. We link the magnitude of the effect to the magnetic exchange energy on the dimer bonds in the Sutherland-Shastry spin lattice in this material. The corresponding dimer spin correlations are quantitatively estimated and found to be strongly pressure dependent. At around P$_2\sim$22 kbar they switch from antiferromagnetic to being predominantly ferromagnetic. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1907.09316v3-abstract-full').style.display = 'none'; document.getElementById('1907.09316v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 July, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Research 2, 012010(R) (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.11172">arXiv:1902.11172</a> <span> [<a href="https://arxiv.org/pdf/1902.11172">pdf</a>, <a href="https://arxiv.org/format/1902.11172">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.99.184437">10.1103/PhysRevB.99.184437 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb$_2$VO(PO$_4$)$_2$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Landolt%2C+F">Florian Landolt</a>, <a href="/search/cond-mat?searchtype=author&query=Aksoy%2C+%C3%96+M">脰mer M. Aksoy</a>, <a href="/search/cond-mat?searchtype=author&query=Yan%2C+Z">Zewu Yan</a>, <a href="/search/cond-mat?searchtype=author&query=Gvasaliya%2C+S">Severian Gvasaliya</a>, <a href="/search/cond-mat?searchtype=author&query=Qiu%2C+Y">Yiming Qiu</a>, <a href="/search/cond-mat?searchtype=author&query=Ressouche%2C+E">Eric Ressouche</a>, <a href="/search/cond-mat?searchtype=author&query=Beauvois%2C+K">Ketty Beauvois</a>, <a href="/search/cond-mat?searchtype=author&query=Raymond%2C+S">St茅phane Raymond</a>, <a href="/search/cond-mat?searchtype=author&query=Ponomaryov%2C+A+N">Alexey N. Ponomaryov</a>, <a href="/search/cond-mat?searchtype=author&query=Zvyagin%2C+S+A">Sergei A. Zvyagin</a>, <a href="/search/cond-mat?searchtype=author&query=Zheludev%2C+A">Andrey Zheludev</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="1902.11172v3-abstract-short" style="display: inline;"> Single crystal neutron diffraction, inelastic neutron scattering and electron spin resonance experiments are used to study the magnetic structure and spin waves in Pb$_2$VO(PO$_4$)$_2$, a prototypical layered $S=1/2$ ferromagnet with frustrating next nearest neighbor antiferromagnetic interactions. The observed excitation spectrum is found to be inconsistent with a simple square lattice model prev… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.11172v3-abstract-full').style.display = 'inline'; document.getElementById('1902.11172v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.11172v3-abstract-full" style="display: none;"> Single crystal neutron diffraction, inelastic neutron scattering and electron spin resonance experiments are used to study the magnetic structure and spin waves in Pb$_2$VO(PO$_4$)$_2$, a prototypical layered $S=1/2$ ferromagnet with frustrating next nearest neighbor antiferromagnetic interactions. The observed excitation spectrum is found to be inconsistent with a simple square lattice model previously proposed for this material. At least four distinct exchange coupling constants are required to reproduce the measured spin wave dispersion. The degree of magnetic frustration is correspondingly revised and found to be substantially smaller than in all previous estimates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.11172v3-abstract-full').style.display = 'none'; document.getElementById('1902.11172v3-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 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 99, 184437 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1705.10235">arXiv:1705.10235</a> <span> [<a href="https://arxiv.org/pdf/1705.10235">pdf</a>, <a href="https://arxiv.org/format/1705.10235">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.96.174431">10.1103/PhysRevB.96.174431 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> High pressure Raman study of the quantum magnet (C$_4$H$_{12}$N$_2$)Cu$_2$Cl$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Bettler%2C+S">Simon Bettler</a>, <a href="/search/cond-mat?searchtype=author&query=Simutis%2C+G">Gediminas Simutis</a>, <a href="/search/cond-mat?searchtype=author&query=Perren%2C+G">G茅rard Perren</a>, <a href="/search/cond-mat?searchtype=author&query=Blosser%2C+D">Dominic Blosser</a>, <a href="/search/cond-mat?searchtype=author&query=Gvasaliya%2C+S">Severian Gvasaliya</a>, <a href="/search/cond-mat?searchtype=author&query=Zheludev%2C+A">Andrey Zheludev</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="1705.10235v3-abstract-short" style="display: inline;"> Magnetic and lattice excitations in the quantum antiferromagnet (C$_4$H$_{12}$N$_2$)Cu$_2$Cl$_6$ (PHCC) are studied across two pressure-induced phase transition at $P_c=4.3~\mathrm{kbar}$ and $P_1=13.4~\mathrm{kbar}$ using Raman spectroscopy. It is confirmed that neither transition is a result of a structural transformation. Magnetic scattering is detected. It shows a pronounced pressure dependenc… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.10235v3-abstract-full').style.display = 'inline'; document.getElementById('1705.10235v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1705.10235v3-abstract-full" style="display: none;"> Magnetic and lattice excitations in the quantum antiferromagnet (C$_4$H$_{12}$N$_2$)Cu$_2$Cl$_6$ (PHCC) are studied across two pressure-induced phase transition at $P_c=4.3~\mathrm{kbar}$ and $P_1=13.4~\mathrm{kbar}$ using Raman spectroscopy. It is confirmed that neither transition is a result of a structural transformation. Magnetic scattering is detected. It shows a pronounced pressure dependence and undergoes substantial changes at both transitions. The results are in clear contradiction with previous neutron studies, which detected only minor changes of the magnon spectrum at $P_1$. A number of phonons show anomalous frequency shifts at low temperatures. This effect is pressure dependent and for two of the observed phonons dramatically reverses sign at around $P_1$. The anomalous behavior is attributed to strong magnetoelastic coupling in PHCC. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1705.10235v3-abstract-full').style.display = 'none'; document.getElementById('1705.10235v3-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 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 May, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 96, 174431 (2017) </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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