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</div> <div class="control"> <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/2409.04325">arXiv:2409.04325</a> <span> [<a href="https://arxiv.org/pdf/2409.04325">pdf</a>, <a href="https://arxiv.org/format/2409.04325">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> <p class="title is-5 mathjax"> Pressure induced quasi-long-range $\sqrt{3} \times \sqrt{3}$ charge density wave and competing orders in the kagome metal FeGe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">A. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Kar%2C+A">A. Kar</a>, <a href="/search/cond-mat?searchtype=author&query=Lim%2C+C+-">C. -Y. Lim</a>, <a href="/search/cond-mat?searchtype=author&query=Subires%2C+D">D. Subires</a>, <a href="/search/cond-mat?searchtype=author&query=Deng%2C+J">J. Deng</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+Y">Y. Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+H">H. Hu</a>, <a href="/search/cond-mat?searchtype=author&query=C%C4%83lug%C4%83ru%2C+D">D. C膬lug膬ru</a>, <a href="/search/cond-mat?searchtype=author&query=Yi%2C+C">C. Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Roychowdhury%2C+S">S. Roychowdhury</a>, <a href="/search/cond-mat?searchtype=author&query=Shekhar%2C+C">C. Shekhar</a>, <a href="/search/cond-mat?searchtype=author&query=Garbarino%2C+G">G. Garbarino</a>, <a href="/search/cond-mat?searchtype=author&query=T%C3%B6rm%C3%A4%2C+P">P. T枚rm盲</a>, <a href="/search/cond-mat?searchtype=author&query=Felser%2C+C">C. Felser</a>, <a href="/search/cond-mat?searchtype=author&query=Bernevig%2C+B+A">B. Andrei Bernevig</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Canosa%2C+S">S. Blanco-Canosa</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="2409.04325v1-abstract-short" style="display: inline;"> Electronic ordering is prevalent in correlated systems, which commonly exhibit competing interactions. Here, we use x-ray diffraction to show that the charge density wave transition temperature of FeGe increases with pressure and evolves towards a $\sqrt{3}\times\sqrt{3}$ periodic lattice modulation, $\mathbf{q}$$^*$=$\left(\frac{1}{3}\ \frac{1}{3}\ \frac{1}{2}\right)$. In the pressure interval be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.04325v1-abstract-full').style.display = 'inline'; document.getElementById('2409.04325v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2409.04325v1-abstract-full" style="display: none;"> Electronic ordering is prevalent in correlated systems, which commonly exhibit competing interactions. Here, we use x-ray diffraction to show that the charge density wave transition temperature of FeGe increases with pressure and evolves towards a $\sqrt{3}\times\sqrt{3}$ periodic lattice modulation, $\mathbf{q}$$^*$=$\left(\frac{1}{3}\ \frac{1}{3}\ \frac{1}{2}\right)$. In the pressure interval between 4$<$$p$$<$12 GPa both orders coexist and the spatial extent of the $\sqrt{3}\times\sqrt{3}$ order at high pressure becomes nearly long-range, $\sim$30 unit cells, while the correlation length of the 2$\times$2 phase remains shorter-ranged. The $\sqrt{3}\times\sqrt{3}$ phase is the ground state above 15 GPa, consistent with harmonic DFT calculations that predict a dimerization induced $\sqrt{3}\times\sqrt{3}$ order without phonon softening. The pressure dependence of the integrated intensities of $\mathbf{q}$$_\mathrm{CDW}=\left(\frac{1}{2}\ 0\ \frac{1}{2}\right)$ and $\mathbf{q}$$^*$ indicates a competition between the 2$\times$2 and $\sqrt{3}\times\sqrt{3}$ and demonstrates that the ground state of FeGe is characterized by a rich landscape of metastable/fragile phases. We discuss possible scenarios based on an order-disorder transformation and the formation of Friedel oscillations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2409.04325v1-abstract-full').style.display = 'none'; document.getElementById('2409.04325v1-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, 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/2408.04452">arXiv:2408.04452</a> <span> [<a href="https://arxiv.org/pdf/2408.04452">pdf</a>, <a href="https://arxiv.org/format/2408.04452">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> <p class="title is-5 mathjax"> Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Subires%2C+D">D. Subires</a>, <a href="/search/cond-mat?searchtype=author&query=Kar%2C+A">A. Kar</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">A. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Fuller%2C+C+A">C. A. Fuller</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+Y">Y. Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+H">H. Hu</a>, <a href="/search/cond-mat?searchtype=author&query=C%C4%83lug%C4%83ru%2C+D">Dumitru C膬lug膬ru</a>, <a href="/search/cond-mat?searchtype=author&query=McMonagle%2C+C">C. McMonagle</a>, <a href="/search/cond-mat?searchtype=author&query=Yi%2C+C">C. Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Roychowdhury%2C+S">S. Roychowdhury</a>, <a href="/search/cond-mat?searchtype=author&query=Shekhar%2C+C">C. Shekhar</a>, <a href="/search/cond-mat?searchtype=author&query=Strempfer%2C+J">J. Strempfer</a>, <a href="/search/cond-mat?searchtype=author&query=Jana%2C+A">A. Jana</a>, <a href="/search/cond-mat?searchtype=author&query=Vobornik%2C+I">I. Vobornik</a>, <a href="/search/cond-mat?searchtype=author&query=Dai%2C+J">J. Dai</a>, <a href="/search/cond-mat?searchtype=author&query=Tallarida%2C+M">M. Tallarida</a>, <a href="/search/cond-mat?searchtype=author&query=Chernyshov%2C+D">D. Chernyshov</a>, <a href="/search/cond-mat?searchtype=author&query=Bosak%2C+A">A. Bosak</a>, <a href="/search/cond-mat?searchtype=author&query=Felser%2C+C">C. Felser</a>, <a href="/search/cond-mat?searchtype=author&query=Bernevig%2C+B+A">B. Andrei Bernevig</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Canosa%2C+S">S. Blanco-Canosa</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="2408.04452v1-abstract-short" style="display: inline;"> The intrinsic frustrated nature of a kagome lattice is amenable to the realization of exotic phases of matter, such as quantum spin liquids or spin ices, and more recently the multiple-$\mathrm{\textbf{q}}$ charge density waves (CDW) in the kagome metals. Despite intense efforts to understand the mechanism driving the electronic modulations, its origin is still unknown and hindered by competing in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.04452v1-abstract-full').style.display = 'inline'; document.getElementById('2408.04452v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2408.04452v1-abstract-full" style="display: none;"> The intrinsic frustrated nature of a kagome lattice is amenable to the realization of exotic phases of matter, such as quantum spin liquids or spin ices, and more recently the multiple-$\mathrm{\textbf{q}}$ charge density waves (CDW) in the kagome metals. Despite intense efforts to understand the mechanism driving the electronic modulations, its origin is still unknown and hindered by competing interactions and intertwined orders. Here, we identify a dimerization-driven 2D hexagonal charge-diffuse precursor in the antiferromagnetic kagome metal FeGe and demonstrate that the fraction of dimerized/undimerized states is the relevant order parameter of the multiple-$\mathrm{\textbf{q}}$ CDW of a continuous phase transition. The pretransitional charge fluctuations with propagation vector $\mathrm{\textbf{q}=\textbf{q}_M}$ at T$_{\mathrm{CDW}}$$<$T$<$T$^*$(125 K) are anisotropic, hence holding a quasi-long-range bond-orientational order. The broken translational symmetry emerges from the anisotropic diffuse precursor, akin to the Ising scenario of antiferromagnetic triangular lattices. The temperature and momentum dependence of the critical scattering show parallels to the stacked hexatic $\mathrm{B}$-phases reported in liquid crystals and transient states of CDWs and highlight the key role of the topological defect-mediated melting of the CDW in FeGe. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2408.04452v1-abstract-full').style.display = 'none'; document.getElementById('2408.04452v1-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 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2402.15397">arXiv:2402.15397</a> <span> [<a href="https://arxiv.org/pdf/2402.15397">pdf</a>, <a href="https://arxiv.org/format/2402.15397">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> <p class="title is-5 mathjax"> Phonon softening and atomic modulations in EuAl$_4$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A+N">A. N. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Sukhanov%2C+A+S">A. S. Sukhanov</a>, <a href="/search/cond-mat?searchtype=author&query=Gebel%2C+S">S. Gebel</a>, <a href="/search/cond-mat?searchtype=author&query=Pavlovskii%2C+M+S">M. S. Pavlovskii</a>, <a href="/search/cond-mat?searchtype=author&query=Andriushin%2C+N+D">N. D. Andriushin</a>, <a href="/search/cond-mat?searchtype=author&query=Gao%2C+Y">Y. Gao</a>, <a href="/search/cond-mat?searchtype=author&query=Moya%2C+J+M">J. M. Moya</a>, <a href="/search/cond-mat?searchtype=author&query=Morosan%2C+E">E. Morosan</a>, <a href="/search/cond-mat?searchtype=author&query=Rahn%2C+M+C">M. C. Rahn</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="2402.15397v1-abstract-short" style="display: inline;"> EuAl$_4$ is a rare earth intermetallic in which competing itinerant and/or indirect exchange mechanisms give rise to a complex magnetic phase diagram, including a centrosymmetric skyrmion lattice. These phenomena arise not in the tetragonal parent structure but in the presence of a charge density wave (CDW), which lowers the crystal symmetry and renormalizes the electronic structure. Microscopic k… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.15397v1-abstract-full').style.display = 'inline'; document.getElementById('2402.15397v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2402.15397v1-abstract-full" style="display: none;"> EuAl$_4$ is a rare earth intermetallic in which competing itinerant and/or indirect exchange mechanisms give rise to a complex magnetic phase diagram, including a centrosymmetric skyrmion lattice. These phenomena arise not in the tetragonal parent structure but in the presence of a charge density wave (CDW), which lowers the crystal symmetry and renormalizes the electronic structure. Microscopic knowledge of the corresponding atomic modulations and their driving mechanism is a prerequisite for a deeper understanding of the resulting equilibrium of electronic correlations and how it might be manipulated. Here, we use synchrotron single-crystal X-ray diffraction, inelastic X-ray scattering, and lattice dynamics calculations to clarify the origin of the CDW in EuAl$_4$. We observe a broad softening of a transverse acoustic phonon mode that sets in well above room temperature and, at $T_\mathrm{CDW}=142$ K, freezes out in an atomic displacement mode described by the superspace group $Immm(00纬)s00$. In the context of previous work, our observation is a clear confirmation that the CDW in EuAl$_4$ is driven by electron-phonon coupling. This result is relevant for a wider family of BaAl$_4$ and ThCr$_2$Si$_2$-type rare-earth intermetallics known to combine CDW instabilities and complex magnetism. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2402.15397v1-abstract-full').style.display = 'none'; document.getElementById('2402.15397v1-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 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2312.04575">arXiv:2312.04575</a> <span> [<a href="https://arxiv.org/pdf/2312.04575">pdf</a>, <a href="https://arxiv.org/format/2312.04575">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="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/PhysRevLett.131.246601">10.1103/PhysRevLett.131.246601 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Phonon topology and winding of spectral weight in graphite </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Andriushin%2C+N+D">N. D. Andriushin</a>, <a href="/search/cond-mat?searchtype=author&query=Sukhanov%2C+A+S">A. S. Sukhanov</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A+N">A. N. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Pavlovskii%2C+M+S">M. S. Pavlovskii</a>, <a href="/search/cond-mat?searchtype=author&query=Rahn%2C+M+C">M. C. Rahn</a>, <a href="/search/cond-mat?searchtype=author&query=Nikitin%2C+S+E">S. E. Nikitin</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="2312.04575v1-abstract-short" style="display: inline;"> The topology of electronic and phonon band structures of graphene is well studied and known to exhibit a Dirac cone at the K point of the Brillouin zone. Here, we applied inelastic x-ray scattering (IXS) along with $\textit{ab initio}$ calculations to investigate phonon topology in graphite, the 3D analogue of graphene. We identified a pair of modes that form a very weakly gapped linear anticrossi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.04575v1-abstract-full').style.display = 'inline'; document.getElementById('2312.04575v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2312.04575v1-abstract-full" style="display: none;"> The topology of electronic and phonon band structures of graphene is well studied and known to exhibit a Dirac cone at the K point of the Brillouin zone. Here, we applied inelastic x-ray scattering (IXS) along with $\textit{ab initio}$ calculations to investigate phonon topology in graphite, the 3D analogue of graphene. We identified a pair of modes that form a very weakly gapped linear anticrossing at the K point that can be essentially viewed as a Dirac cone approximant. The IXS intensity in the vicinity of the quasi-Dirac point reveals a harmonic modulation of the phonon spectral weight above and below the Dirac energy, which was previously proposed as an experimental fingerprint of the nontrivial topology. We illustrate how the topological winding of IXS intensity can be understood in terms of atomic displacements, and highlight that the intensity winding is not in fact sensitive in telling quasi- and true Dirac points apart. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2312.04575v1-abstract-full').style.display = 'none'; document.getElementById('2312.04575v1-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 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2310.20337">arXiv:2310.20337</a> <span> [<a href="https://arxiv.org/pdf/2310.20337">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="Materials Science">cond-mat.mtrl-sci</span> </div> </div> <p class="title is-5 mathjax"> Anomalous T-dependence of phonon lifetimes in metallic VO2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Rischau%2C+C+W">Carl Willem Rischau</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">Artem Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Multian%2C+V">Volodymyr Multian</a>, <a href="/search/cond-mat?searchtype=author&query=Lopez-Paz%2C+S+A">Sara A. Lopez-Paz</a>, <a href="/search/cond-mat?searchtype=author&query=Huang%2C+C">Chubin Huang</a>, <a href="/search/cond-mat?searchtype=author&query=Varbaro%2C+L">Lucia Varbaro</a>, <a href="/search/cond-mat?searchtype=author&query=Teyssier%2C+J">J茅r茅mie Teyssier</a>, <a href="/search/cond-mat?searchtype=author&query=Kalcheim%2C+Y">Yoav Kalcheim</a>, <a href="/search/cond-mat?searchtype=author&query=Gariglio%2C+S">Stefano Gariglio</a>, <a href="/search/cond-mat?searchtype=author&query=Bossak%2C+A">Alexei Bossak</a>, <a href="/search/cond-mat?searchtype=author&query=Triscone%2C+J">Jean-Marc Triscone</a>, <a href="/search/cond-mat?searchtype=author&query=del+Valle%2C+J">Javier del Valle</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="2310.20337v1-abstract-short" style="display: inline;"> We investigate phonon lifetimes in VO2 single crystals. We do so in the metallic state above the metal-insulator transition (MIT), where strong structural fluctuations are known to take place. By combining inelastic X-ray scattering and Raman spectroscopy, we track the temperature dependence of several acoustic and optical phonon modes up to 1000 K. Contrary to what is commonly observed, we find t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.20337v1-abstract-full').style.display = 'inline'; document.getElementById('2310.20337v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2310.20337v1-abstract-full" style="display: none;"> We investigate phonon lifetimes in VO2 single crystals. We do so in the metallic state above the metal-insulator transition (MIT), where strong structural fluctuations are known to take place. By combining inelastic X-ray scattering and Raman spectroscopy, we track the temperature dependence of several acoustic and optical phonon modes up to 1000 K. Contrary to what is commonly observed, we find that phonon lifetimes decrease with decreasing temperature. Our results show that pre-transitional fluctuations in the metallic state give rise to strong electron-phonon scattering that onsets hundreds of degrees above the transition and increases as the MIT is approached. Notably, this effect is not limited to specific points of reciprocal space that could be associated with the structural transition. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2310.20337v1-abstract-full').style.display = 'none'; document.getElementById('2310.20337v1-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 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/2307.15392">arXiv:2307.15392</a> <span> [<a href="https://arxiv.org/pdf/2307.15392">pdf</a>, <a href="https://arxiv.org/format/2307.15392">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"> Electronic structure and lattice dynamics of 1T-VSe$_2$: origin of the 3D-CDW </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Diego%2C+J">Josu Diego</a>, <a href="/search/cond-mat?searchtype=author&query=Subires%2C+D">D. Subires</a>, <a href="/search/cond-mat?searchtype=author&query=Said%2C+A+H">A. H. Said</a>, <a href="/search/cond-mat?searchtype=author&query=Chaney%2C+D+A">D. A. Chaney</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">A. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Garbarino%2C+G">G. Garbarino</a>, <a href="/search/cond-mat?searchtype=author&query=Diekmann%2C+F">F. Diekmann</a>, <a href="/search/cond-mat?searchtype=author&query=Mahatha%2C+K">K. Mahatha</a>, <a href="/search/cond-mat?searchtype=author&query=Pardo%2C+V">V. Pardo</a>, <a href="/search/cond-mat?searchtype=author&query=Strempfer%2C+J">J. Strempfer</a>, <a href="/search/cond-mat?searchtype=author&query=Perez%2C+P+J+B">Pablo J. Bereciartua Perez</a>, <a href="/search/cond-mat?searchtype=author&query=Francoual%2C+S">S. Francoual</a>, <a href="/search/cond-mat?searchtype=author&query=Popescu%2C+C">C. Popescu</a>, <a href="/search/cond-mat?searchtype=author&query=Tallarida%2C+M">M. Tallarida</a>, <a href="/search/cond-mat?searchtype=author&query=Dai%2C+J">J. Dai</a>, <a href="/search/cond-mat?searchtype=author&query=Bianco%2C+R">Raffaello Bianco</a>, <a href="/search/cond-mat?searchtype=author&query=Monacelli%2C+L">Lorenzo Monacelli</a>, <a href="/search/cond-mat?searchtype=author&query=Calandra%2C+M">Matteo Calandra</a>, <a href="/search/cond-mat?searchtype=author&query=Bosak%2C+A">A. Bosak</a>, <a href="/search/cond-mat?searchtype=author&query=Mauri%2C+F">Francesco Mauri</a>, <a href="/search/cond-mat?searchtype=author&query=Rossnagel%2C+K">K. Rossnagel</a>, <a href="/search/cond-mat?searchtype=author&query=Fumega%2C+A+O">Adolfo O. Fumega</a>, <a href="/search/cond-mat?searchtype=author&query=Errea%2C+I">Ion Errea</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Canosa%2C+S">S. Blanco-Canosa</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="2307.15392v1-abstract-short" style="display: inline;"> In order to characterize in detail the charge density wave (CDW) transition of 1$T$-VSe$_2$, its electronic structure and lattice dynamics are comprehensively studied by means of x-ray diffraction, angle resolved photoemission (ARPES), diffuse and inelastic x-ray scattering (IXS), and state-of-the-art first principles density functional theory calculations. Resonant elastic x-ray scattering (REXS)… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.15392v1-abstract-full').style.display = 'inline'; document.getElementById('2307.15392v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2307.15392v1-abstract-full" style="display: none;"> In order to characterize in detail the charge density wave (CDW) transition of 1$T$-VSe$_2$, its electronic structure and lattice dynamics are comprehensively studied by means of x-ray diffraction, angle resolved photoemission (ARPES), diffuse and inelastic x-ray scattering (IXS), and state-of-the-art first principles density functional theory calculations. Resonant elastic x-ray scattering (REXS) does not show any resonant enhancement at either V or Se K-edges, indicating that the CDW peak describes a purely structural modulation of the electronic ordering. ARPES identifies (i) a pseudogap at T$>$T$_{CDW}$, which leads to a depletion of the density of states in the $ML-M'L'$ plane at T$<$T$_{CDW}$, and (ii) anomalies in the electronic dispersion reflecting a sizable impact of phonons on it. A diffuse scattering precursor, characteristic of soft phonons, is observed at room temperature (RT) and leads to the full collapse of the low-energy phonon ($蠅_1$) with propagation vector (0.25 0 -0.3) r.l.u. We show that the frequency and linewidth of this mode are anisotropic in momentum space, reflecting the momentum dependence of the electron-phonon interaction (EPI), hence demonstrating that the origin of the CDW is, to a much larger extent, due to the momentum dependence EPI with a small contribution from nesting. The pressure dependence of the $蠅_1$ soft mode remains nearly constant up to 13 GPa at RT, with only a modest softening before the transition to the high-pressure monoclinic $C2/m$ phase. The wide set of experimental data are well captured by our state-of-the art first-principles anharmonic calculations with the inclusion of van der Waals (vdW) corrections in the exchange-correlation functional. The description of the electronics and dynamics of VSe$_2$ reported here adds important pieces of information to the understanding of the electronic modulations of TMDs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2307.15392v1-abstract-full').style.display = 'none'; document.getElementById('2307.15392v1-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 July, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.09173">arXiv:2304.09173</a> <span> [<a href="https://arxiv.org/pdf/2304.09173">pdf</a>, <a href="https://arxiv.org/format/2304.09173">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="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/10.1038/s41467-023-42186-6">10.1038/s41467-023-42186-6 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Softening of a flat phonon mode in the kagome ScV$_6$Sn$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">A. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Hu%2C+H">H. Hu</a>, <a href="/search/cond-mat?searchtype=author&query=Subires%2C+D">D. Subires</a>, <a href="/search/cond-mat?searchtype=author&query=Jiang%2C+Y">Y. Jiang</a>, <a href="/search/cond-mat?searchtype=author&query=C%C4%83lug%C4%83ru%2C+D">D. C膬lug膬ru</a>, <a href="/search/cond-mat?searchtype=author&query=Feng%2C+X">X. Feng</a>, <a href="/search/cond-mat?searchtype=author&query=Rajapitamahuni%2C+A">A. Rajapitamahuni</a>, <a href="/search/cond-mat?searchtype=author&query=Yi%2C+C">C. Yi</a>, <a href="/search/cond-mat?searchtype=author&query=Roychowdhury%2C+S">S. Roychowdhury</a>, <a href="/search/cond-mat?searchtype=author&query=Vergniory%2C+M+G">M. G. Vergniory</a>, <a href="/search/cond-mat?searchtype=author&query=Strempfer%2C+J">J. Strempfer</a>, <a href="/search/cond-mat?searchtype=author&query=Shekhar%2C+C">C. Shekhar</a>, <a href="/search/cond-mat?searchtype=author&query=Vescovo%2C+E">E. Vescovo</a>, <a href="/search/cond-mat?searchtype=author&query=Chernyshov%2C+D">D. Chernyshov</a>, <a href="/search/cond-mat?searchtype=author&query=Said%2C+A+H">A. H. Said</a>, <a href="/search/cond-mat?searchtype=author&query=Bosak%2C+A">A. Bosak</a>, <a href="/search/cond-mat?searchtype=author&query=Felser%2C+C">C. Felser</a>, <a href="/search/cond-mat?searchtype=author&query=Bernevig%2C+B+A">B. Andrei Bernevig</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Canosa%2C+S">S. Blanco-Canosa</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="2304.09173v1-abstract-short" style="display: inline;"> The long range electronic modulations recently discovered in the geometrically frustrated kagome lattice have opened new avenues to explore the effect of correlations in materials with topological electron flat bands. The observation of the lattice response to the emergent new phases of matter, a soft phonon mode, has remained elusive and the microscopic origin of charge density waves (CDWs) is st… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.09173v1-abstract-full').style.display = 'inline'; document.getElementById('2304.09173v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.09173v1-abstract-full" style="display: none;"> The long range electronic modulations recently discovered in the geometrically frustrated kagome lattice have opened new avenues to explore the effect of correlations in materials with topological electron flat bands. The observation of the lattice response to the emergent new phases of matter, a soft phonon mode, has remained elusive and the microscopic origin of charge density waves (CDWs) is still unknown. Here, we show, for the first time, a complete melting of the ScV$_ 6$Sn$_ 6$ (166) kagome lattice. The low energy phonon with propagation vector $\frac{1}{3} \frac{1}{3} \frac{1}{2}$ collapses at 98 K, without the emergence of long-range charge order, which sets in with a propagation vector $\frac{1}{3} \frac{1}{3} \frac{1}{3}$. The CDW is driven (but locks at a different vector) by the softening of an overdamped phonon flat plane at k$_z$=$蟺$. We observe broad phonon anomalies in momentum space, pointing to (1) the existence of approximately flat phonon bands which gain some dispersion due to electron renormalization, and (2) the effects of the momentum dependent electron-phonon interaction in the CDW formation. Ab initio and analytical calculations corroborate the experimental findings to indicate that the weak leading order phonon instability is located at the wave vector $\frac{1}{3} \frac{1}{3} \frac{1}{2}$ of a rather flat collapsed mode. We analytically compute the phonon frequency renormalization from high temperatures to the soft mode, and relate it to a peak in the orbital-resolved susceptibility, obtaining an excellent match with both ab initio and experimental results, and explaining the origin of the approximately flat phonon dispersion. Our data report the first example of the collapse of a softening of a flat phonon plane and promote the 166 compounds of the kagome family as primary candidates to explore correlated flat phonon-topological flat electron physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.09173v1-abstract-full').style.display = 'none'; document.getElementById('2304.09173v1-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> 18 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">10 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nat. Commun. 14, 6646 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2209.13342">arXiv:2209.13342</a> <span> [<a href="https://arxiv.org/pdf/2209.13342">pdf</a>, <a href="https://arxiv.org/format/2209.13342">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/10.1038/s41467-023-36668-w">10.1038/s41467-023-36668-w <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Order-disorder Peierls instability in the kagome metal (Cs,Rb)V$_3$Sb$_5$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Subires%2C+D">D. Subires</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">A. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Said%2C+A+H">A. H. Said</a>, <a href="/search/cond-mat?searchtype=author&query=S%C3%A1nchez%2C+L">L. S谩nchez</a>, <a href="/search/cond-mat?searchtype=author&query=Ortiz%2C+B+R">Brenden R. Ortiz</a>, <a href="/search/cond-mat?searchtype=author&query=Wilson%2C+S+D">Stephen D. Wilson</a>, <a href="/search/cond-mat?searchtype=author&query=Bosak%2C+A">A. Bosak</a>, <a href="/search/cond-mat?searchtype=author&query=Blanco-Canosa%2C+S">S. Blanco-Canosa</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="2209.13342v2-abstract-short" style="display: inline;"> The nature of the charge density wave phases in the kagome metal compound AV$_3$Sb$_5$ has raised many questions and their origin is still under debate. Here, we combine diffuse scattering (DS) and inelastic x-ray scattering (IXS) to identify a 3-dimensional (3D) precursor of the charge order with propagation vector (0.5 0 0.5), which condenses into a 3D-CDW through a first order phase transition.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.13342v2-abstract-full').style.display = 'inline'; document.getElementById('2209.13342v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2209.13342v2-abstract-full" style="display: none;"> The nature of the charge density wave phases in the kagome metal compound AV$_3$Sb$_5$ has raised many questions and their origin is still under debate. Here, we combine diffuse scattering (DS) and inelastic x-ray scattering (IXS) to identify a 3-dimensional (3D) precursor of the charge order with propagation vector (0.5 0 0.5), which condenses into a 3D-CDW through a first order phase transition. The quasi-elastic critical scattering indicates that the dominant contribution to the diffuse precursor is the elastic central peak without phonon softening. However, the inelastic spectra show a small broadening of the Einstein-type phonon mode on approaching the phase transition. Our results point to the situation where the Fermi surface instability at the \textit{L} point is of order-disorder type with a critical growth of quasi-static domains. The results go beyond the classical weak-coupling Peierls transition dynamics and are discussed within models including strong-electron phonon coupling and non-adiabaticity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2209.13342v2-abstract-full').style.display = 'none'; document.getElementById('2209.13342v2-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 February, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.00134">arXiv:2201.00134</a> <span> [<a href="https://arxiv.org/pdf/2201.00134">pdf</a>, <a href="https://arxiv.org/ps/2201.00134">ps</a>, <a href="https://arxiv.org/format/2201.00134">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/10.1063/5.0086067">10.1063/5.0086067 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Giant widening of interface magnetic layer in almost compensated iron garnet </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kudasov%2C+Y+B">Y. B. Kudasov</a>, <a href="/search/cond-mat?searchtype=author&query=Logunov%2C+M+V">M. V. Logunov</a>, <a href="/search/cond-mat?searchtype=author&query=Kozabaranov%2C+R+V">R. V. Kozabaranov</a>, <a href="/search/cond-mat?searchtype=author&query=Makarov%2C+I+V">I. V. Makarov</a>, <a href="/search/cond-mat?searchtype=author&query=Platonov%2C+V+V">V. V. Platonov</a>, <a href="/search/cond-mat?searchtype=author&query=Surdin%2C+O+M">O. M. Surdin</a>, <a href="/search/cond-mat?searchtype=author&query=Maslov%2C+D+A">D. A. Maslov</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A+S">A. S. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Strelkov%2C+I+S">I. S. Strelkov</a>, <a href="/search/cond-mat?searchtype=author&query=Stognij%2C+A+I">A. I. Stognij</a>, <a href="/search/cond-mat?searchtype=author&query=Selemir%2C+V+D">V. D. Selemir</a>, <a href="/search/cond-mat?searchtype=author&query=Nikitov%2C+S+A">S. A. Nikitov</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="2201.00134v1-abstract-short" style="display: inline;"> A two-sublattice ferrimagnet undergoes a transition from a collinear to canted magnetic phase at magnetic field oriented along an easy magnetization direction. In this work, we study the transition by means of the magneto-optical Faraday effect in a thin film of compensated iron garnet (Lu$_{3-{\rm{x}}}$Bi$_{\rm{x}}$)(Fe$_{5-{\rm{y}}-{\rm{z}}}$Ga$_{\rm{y}}$Al$_{\rm{z}}$)O$_{12}$ grown on Gd$_3$Ga… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.00134v1-abstract-full').style.display = 'inline'; document.getElementById('2201.00134v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.00134v1-abstract-full" style="display: none;"> A two-sublattice ferrimagnet undergoes a transition from a collinear to canted magnetic phase at magnetic field oriented along an easy magnetization direction. In this work, we study the transition by means of the magneto-optical Faraday effect in a thin film of compensated iron garnet (Lu$_{3-{\rm{x}}}$Bi$_{\rm{x}}$)(Fe$_{5-{\rm{y}}-{\rm{z}}}$Ga$_{\rm{y}}$Al$_{\rm{z}}$)O$_{12}$ grown on Gd$_3$Ga$_5$O$_{12}$ substrate. In the immediate vicinity of the compensation temperature a precursor of the transition with a complex shape was observed. Using a special sample with variable thickness we demonstrate an interfacial origin of the precursor. Diffusion of gadolinium from the substrate into the film forms a thin intermixed layer with enhanced magnetization. It induces an extended inhomogeneous magnetic structure in the film. A two-step shape of the precursor appears due to an easy-plane anisotropy of the intermixed magnetic layer. We emphasize that an effective width of the inhomogeneous magnetization distribution in the film grows enormously while approaching the compensation temperature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.00134v1-abstract-full').style.display = 'none'; document.getElementById('2201.00134v1-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 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, 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/2012.01093">arXiv:2012.01093</a> <span> [<a href="https://arxiv.org/pdf/2012.01093">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/10.1039/C9NJ03627J">10.1039/C9NJ03627J <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Synthesis, structure and magnetic properties of honeycomb-layered Li3Co2SbO6 with new data on its sodium precursor, Na3Co2SbO6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Stratan%2C+M+I">M. I. Stratan</a>, <a href="/search/cond-mat?searchtype=author&query=Shukaev%2C+I+L">I. L. Shukaev</a>, <a href="/search/cond-mat?searchtype=author&query=Vasilchikova%2C+T+M">T. M. Vasilchikova</a>, <a href="/search/cond-mat?searchtype=author&query=Vasiliev%2C+A+N">A. N. Vasiliev</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A+N">A. N. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Kurbakov%2C+A+I">A. I. Kurbakov</a>, <a href="/search/cond-mat?searchtype=author&query=Nalbandyan%2C+V+B">V. B. Nalbandyan</a>, <a href="/search/cond-mat?searchtype=author&query=Zvereva%2C+E+A">E. A. Zvereva</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="2012.01093v1-abstract-short" style="display: inline;"> Li3Co2SbO6 is prepared by molten salt ion exchange and its structure refined by the Rietveld method confirming the honeycomb-type Co/Sb ordering of its Na precursor. Monoclinic rather than trigonal symmetry of Na3Co2SbO6 is directly demonstrated for the first time by peak splitting in the high-resolution synchrotron XRD pattern. The long-range antiferromagnetic order is established at TN about 6.7… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.01093v1-abstract-full').style.display = 'inline'; document.getElementById('2012.01093v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2012.01093v1-abstract-full" style="display: none;"> Li3Co2SbO6 is prepared by molten salt ion exchange and its structure refined by the Rietveld method confirming the honeycomb-type Co/Sb ordering of its Na precursor. Monoclinic rather than trigonal symmetry of Na3Co2SbO6 is directly demonstrated for the first time by peak splitting in the high-resolution synchrotron XRD pattern. The long-range antiferromagnetic order is established at TN about 6.7 K and 9.9 K in Na3Co2SbO6 and Li3Co2SbO6, respectively, confirmed by both the magnetic susceptibility and specific heat. Spin-wave analysis of specific heat data indicates the presence of 3D AFM magnons in Na3Co2SbO6 and 2D AFM magnons in Li3Co2SbO6. The field dependence of the magnetization almost reaches saturation in moderate magnetic fields up to 9 T and demonstrates characteristic features of magnetic field induced spin-reorientation transitions for both A3Co2SbO6 (A = Na, Li). Overall thermodynamic studies show that the magnetic properties of both compounds are very sensitive to an external magnetic field, thus predicting a non-trivial ground state with a rich magnetic phase diagram. The ground state spin configuration of Li3Co2SbO6 has been determined by low-temperature neutron powder diffraction. It represents a ferromagnetic arrangement of moments in the honeycomb layers with antiferromagnetic coupling between adjacent layers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2012.01093v1-abstract-full').style.display = 'none'; document.getElementById('2012.01093v1-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 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1606.05485">arXiv:1606.05485</a> <span> [<a href="https://arxiv.org/pdf/1606.05485">pdf</a>, <a href="https://arxiv.org/ps/1606.05485">ps</a>, <a href="https://arxiv.org/format/1606.05485">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.94.155421">10.1103/PhysRevB.94.155421 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Temperature-dependent magnetospectroscopy of HgTe quantum wells </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Ikonnikov%2C+A+V">A. V. Ikonnikov</a>, <a href="/search/cond-mat?searchtype=author&query=Krishtopenko%2C+S+S">S. S. Krishtopenko</a>, <a href="/search/cond-mat?searchtype=author&query=Drachenko%2C+O">O. Drachenko</a>, <a href="/search/cond-mat?searchtype=author&query=Goiran%2C+M">M. Goiran</a>, <a href="/search/cond-mat?searchtype=author&query=Zholudev%2C+M+S">M. S. Zholudev</a>, <a href="/search/cond-mat?searchtype=author&query=Platonov%2C+V+V">V. V. Platonov</a>, <a href="/search/cond-mat?searchtype=author&query=Kudasov%2C+Y+B">Yu. B. Kudasov</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A+S">A. S. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Maslov%2C+D+A">D. A. Maslov</a>, <a href="/search/cond-mat?searchtype=author&query=Makarov%2C+I+V">I. V. Makarov</a>, <a href="/search/cond-mat?searchtype=author&query=Surdin%2C+O+M">O. M. Surdin</a>, <a href="/search/cond-mat?searchtype=author&query=Philippov%2C+A+V">A. V. Philippov</a>, <a href="/search/cond-mat?searchtype=author&query=Marcinkiewicz%2C+M">M. Marcinkiewicz</a>, <a href="/search/cond-mat?searchtype=author&query=Ruffenach%2C+S">S. Ruffenach</a>, <a href="/search/cond-mat?searchtype=author&query=Teppe%2C+F">F. Teppe</a>, <a href="/search/cond-mat?searchtype=author&query=Knap%2C+W">W. Knap</a>, <a href="/search/cond-mat?searchtype=author&query=Mikhailov%2C+N+N">N. N. Mikhailov</a>, <a href="/search/cond-mat?searchtype=author&query=Dvoretsky%2C+S+A">S. A. Dvoretsky</a>, <a href="/search/cond-mat?searchtype=author&query=Gavrilenko%2C+V+I">V. I. Gavrilenko</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="1606.05485v2-abstract-short" style="display: inline;"> We report on magnetospectroscopy of HgTe quantum wells in magnetic fields up to 45 T in temperature range from 4.2 K up to 185 K. We observe intra- and inter-band transitions from zero-mode Landau levels, which split from the bottom conduction and upper valence subbands, and merge under the applied magnetic field. To describe experimental results, realistic temperature-dependent calculations of La… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.05485v2-abstract-full').style.display = 'inline'; document.getElementById('1606.05485v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1606.05485v2-abstract-full" style="display: none;"> We report on magnetospectroscopy of HgTe quantum wells in magnetic fields up to 45 T in temperature range from 4.2 K up to 185 K. We observe intra- and inter-band transitions from zero-mode Landau levels, which split from the bottom conduction and upper valence subbands, and merge under the applied magnetic field. To describe experimental results, realistic temperature-dependent calculations of Landau levels have been performed. We show that although our samples are topological insulators at low temperatures only, the signature of such phase persists in optical transitions at high temperatures and high magnetic fields. Our results demonstrate that temperature-dependent magnetospectroscopy is a powerful tool to discriminate trivial and topological insulator phases in HgTe quantum wells. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1606.05485v2-abstract-full').style.display = 'none'; document.getElementById('1606.05485v2-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> 30 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 17 June, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 94, 155421 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.00811">arXiv:1512.00811</a> <span> [<a href="https://arxiv.org/pdf/1512.00811">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> </div> </div> <p class="title is-5 mathjax"> Determination of the Coupling Coefficient C(谓) from the Calculations of the Low-frequency Raman Spectrum in PMMA </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1512.00811v1-abstract-short" style="display: inline;"> Using the atom-atom potentials method, we have calculated the low-frequency Raman spectra of molecular crystal model with elements of disorder (Poly-Methyl-Methacrylate) PMMA that has a flexible molecule. Based on the results the coupling factor C(谓) has been calculated. Anharmonicity of vibrations, electro-optical anharmonicity, and disorder were taken into account. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.00811v1-abstract-full" style="display: none;"> Using the atom-atom potentials method, we have calculated the low-frequency Raman spectra of molecular crystal model with elements of disorder (Poly-Methyl-Methacrylate) PMMA that has a flexible molecule. Based on the results the coupling factor C(谓) has been calculated. Anharmonicity of vibrations, electro-optical anharmonicity, and disorder were taken into account. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.00811v1-abstract-full').style.display = 'none'; document.getElementById('1512.00811v1-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 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </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">2 pages, 2 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/1311.7010">arXiv:1311.7010</a> <span> [<a href="https://arxiv.org/pdf/1311.7010">pdf</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="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Appearance of lines due to $K \neq 0$ oscillations in lattice vibrations spectra of paradibrombenzene nanoparticles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1311.7010v1-abstract-short" style="display: inline;"> We measured low-frequency Raman spectra of paradibromobenzene nanoparticles. With the reduction of the nanoparticles size frequencies of lines become smaller and the doubling of the most intensive lines takes place. Additional lines with increasing intensity appear in the spectrum. We did structure calculations for nanoparticles by the method of molecular dynamics and obtained histograms of lattic… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.7010v1-abstract-full').style.display = 'inline'; document.getElementById('1311.7010v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1311.7010v1-abstract-full" style="display: none;"> We measured low-frequency Raman spectra of paradibromobenzene nanoparticles. With the reduction of the nanoparticles size frequencies of lines become smaller and the doubling of the most intensive lines takes place. Additional lines with increasing intensity appear in the spectrum. We did structure calculations for nanoparticles by the method of molecular dynamics and obtained histograms of lattice vibrations spectra by the Dyne's method. Calculations have shown that doubling of lines is due to the appearance of nanoparticles vibrations from borders of the Brillouin zone in the spectrum. Additional lines are caused by vibrations with $K \neq 0$. They have mixed orientation-translational character (that is evident from the eigenvectors of vibrations) that affects intensity of these lines. Upon reduction of the particles sizes change of vibration eigenvectors of molecules occurs $K \neq 0$. The greatest changes observed for a 20 cm$^{-1}$ paradibromobenzene line. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1311.7010v1-abstract-full').style.display = 'none'; document.getElementById('1311.7010v1-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 November, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2013. </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, 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/1211.1767">arXiv:1211.1767</a> <span> [<a href="https://arxiv.org/pdf/1211.1767">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Arrangement of DOBAMBC molecules inside the capsule on change of the molecule's inclination on the border of the capsule investigated by the molecular dynamics method </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1211.1767v1-abstract-short" style="display: inline;"> The method of molecular dynamics is used to investigate the distribution of DOBAMBC molecules in a capsule with the fixed border layer. Change of an arrangement of molecules in smectic layers depending on an inclination of molecules on border is considered. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.1767v1-abstract-full" style="display: none;"> The method of molecular dynamics is used to investigate the distribution of DOBAMBC molecules in a capsule with the fixed border layer. Change of an arrangement of molecules in smectic layers depending on an inclination of molecules on border is considered. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1767v1-abstract-full').style.display = 'none'; document.getElementById('1211.1767v1-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 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </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</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1211.1766">arXiv:1211.1766</a> <span> [<a href="https://arxiv.org/pdf/1211.1766">pdf</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="Chemical Physics">physics.chem-ph</span> </div> </div> <p class="title is-5 mathjax"> Determination of the paradihlorobenzene and paradibromobenzene solid solutions nanoparticles structure via Raman spectra </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1211.1766v1-abstract-short" style="display: inline;"> We measured the small frequencies Raman spectrum of the paradihlorobenzene and paradihlorobenzene solid solution nanoparticles with the size about 100 nanometers. Values of frequencies of lines decrease. The size of nanoparticles was determined by the electronic microscope. Calculations of nanoparticles structure were done using the method of molecular dynamics and histograms of nanoparticles spec… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1766v1-abstract-full').style.display = 'inline'; document.getElementById('1211.1766v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1211.1766v1-abstract-full" style="display: none;"> We measured the small frequencies Raman spectrum of the paradihlorobenzene and paradihlorobenzene solid solution nanoparticles with the size about 100 nanometers. Values of frequencies of lines decrease. The size of nanoparticles was determined by the electronic microscope. Calculations of nanoparticles structure were done using the method of molecular dynamics and histograms of nanoparticles spectra were calculated via the Dyne's method. The result is that the Raman spectrum is the sum of spectra from the central part of the nanoparticle and superficial structures with smaller concentration of paradihlorobenzene. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1211.1766v1-abstract-full').style.display = 'none'; document.getElementById('1211.1766v1-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 November, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2012. </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">4 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1111.5883">arXiv:1111.5883</a> <span> [<a href="https://arxiv.org/pdf/1111.5883">pdf</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> <p class="title is-5 mathjax"> Lattice Fluctuations Spectrum Calculation for P-dihlorbenzol Nanocrystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1111.5883v1-abstract-short" style="display: inline;"> We have measured spectra of lattice fluctuations in p-dihlorbenzol nanoparticles of ~300nm size. Calculations of lattice frequencies and of these fluctuations in nanoparticles are done. It is shown that with reduction of nanoparticles sizes the spectrum of superficial fluctuations becomes prevailing. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.5883v1-abstract-full" style="display: none;"> We have measured spectra of lattice fluctuations in p-dihlorbenzol nanoparticles of ~300nm size. Calculations of lattice frequencies and of these fluctuations in nanoparticles are done. It is shown that with reduction of nanoparticles sizes the spectrum of superficial fluctuations becomes prevailing. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.5883v1-abstract-full').style.display = 'none'; document.getElementById('1111.5883v1-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 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </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">3 pages, 2 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/1111.5881">arXiv:1111.5881</a> <span> [<a href="https://arxiv.org/pdf/1111.5881">pdf</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="Soft Condensed Matter">cond-mat.soft</span> </div> </div> <p class="title is-5 mathjax"> Investigation of the behavior of 5CB in a pore and a nano capsule </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1111.5881v1-abstract-short" style="display: inline;"> We use a method of molecular dynamics to investigate the distribution of liquid crystal 5CB molecules in a polymeric matrix. Temperature dependences of parameters of an order <P2> are calculated. Calculations have shown that depending on the size of a capsule and on a time the transition temperature changes. </span> <span class="abstract-full has-text-grey-dark mathjax" id="1111.5881v1-abstract-full" style="display: none;"> We use a method of molecular dynamics to investigate the distribution of liquid crystal 5CB molecules in a polymeric matrix. Temperature dependences of parameters of an order <P2> are calculated. Calculations have shown that depending on the size of a capsule and on a time the transition temperature changes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1111.5881v1-abstract-full').style.display = 'none'; document.getElementById('1111.5881v1-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 November, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2011. </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">2 pages, 2 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/1004.3841">arXiv:1004.3841</a> <span> [<a href="https://arxiv.org/pdf/1004.3841">pdf</a>, <a href="https://arxiv.org/format/1004.3841">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="Optics">physics.optics</span> </div> </div> <p class="title is-5 mathjax"> Polymorphic transition in p-dihlorbenzol nanoparticles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="1004.3841v1-abstract-short" style="display: inline;"> We have obtained experimentally the low frequency Raman spectra of p-dihlorbenzol nanoparticles. Nanoparticle sizes are determined with the help of electron microscope. It was found that in the lattice vibration spectra from 70 nm the summary spectrum of 伪-paradihlorbenzola and 尾-paradihlorbenzol structures appears. It agrees with both calculations of nanoparticle structure by molecular dynamics… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1004.3841v1-abstract-full').style.display = 'inline'; document.getElementById('1004.3841v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1004.3841v1-abstract-full" style="display: none;"> We have obtained experimentally the low frequency Raman spectra of p-dihlorbenzol nanoparticles. Nanoparticle sizes are determined with the help of electron microscope. It was found that in the lattice vibration spectra from 70 nm the summary spectrum of 伪-paradihlorbenzola and 尾-paradihlorbenzol structures appears. It agrees with both calculations of nanoparticle structure by molecular dynamics and calculations of spectra histograms of the lattice vibrations by a Dyne's method. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1004.3841v1-abstract-full').style.display = 'none'; document.getElementById('1004.3841v1-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 April, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2010. </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, 2 figures, 1 table</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0910.3708">arXiv:0910.3708</a> <span> [<a href="https://arxiv.org/pdf/0910.3708">pdf</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> <p class="title is-5 mathjax"> Stretching Vibrations of C-Br in P-Dibromobenzene Nanoparticles </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0910.3708v1-abstract-short" style="display: inline;"> Raman spectrums of nanoparticles of a p-dibromobenzene with size of 300 nanometers and 50 nanometers are measured. It is found that frequencies of lines of stretching vibrations of C-Br at reduction of the sizes of nanoparticles below 300 nanometers are incremented. It is related to magnification of parameters of the lattice and interaction reduction between molecules. </span> <span class="abstract-full has-text-grey-dark mathjax" id="0910.3708v1-abstract-full" style="display: none;"> Raman spectrums of nanoparticles of a p-dibromobenzene with size of 300 nanometers and 50 nanometers are measured. It is found that frequencies of lines of stretching vibrations of C-Br at reduction of the sizes of nanoparticles below 300 nanometers are incremented. It is related to magnification of parameters of the lattice and interaction reduction between molecules. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.3708v1-abstract-full').style.display = 'none'; document.getElementById('0910.3708v1-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 October, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2009. </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">2 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0910.3707">arXiv:0910.3707</a> <span> [<a href="https://arxiv.org/pdf/0910.3707">pdf</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> <p class="title is-5 mathjax"> Observation of the Accelerated Diffusion in Nanoparticles of Paradibromobenzene /Paradihlorbenzene Solid Solution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0910.3707v1-abstract-short" style="display: inline;"> P-dibromobenzene nanoparticles in a case of paradihlorbenzol molecules have been synthesized. Raman spectrums of these nanoparticles are measured. At diffusion of molecules of paradihlorbenzol in a pdibromobenzene nanoparticle solid solution formed. Modifications in structure of nanoparticles at diffusion are reflected in Raman spectrums. Unlike a solid solution single crystal, in nanoparticles… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.3707v1-abstract-full').style.display = 'inline'; document.getElementById('0910.3707v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0910.3707v1-abstract-full" style="display: none;"> P-dibromobenzene nanoparticles in a case of paradihlorbenzol molecules have been synthesized. Raman spectrums of these nanoparticles are measured. At diffusion of molecules of paradihlorbenzol in a pdibromobenzene nanoparticle solid solution formed. Modifications in structure of nanoparticles at diffusion are reflected in Raman spectrums. Unlike a solid solution single crystal, in nanoparticles the accelerated diffusion, $D = 1.3 \pm 0.02 10^{-11} cm^2/s$, is observed at room temperature. Calculations show that the accelerated diffusion is caused by magnification of parametres of a lattice at reduction of sizes of nanoparticles. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.3707v1-abstract-full').style.display = 'none'; document.getElementById('0910.3707v1-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 October, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2009. </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">3 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0910.3706">arXiv:0910.3706</a> <span> [<a href="https://arxiv.org/pdf/0910.3706">pdf</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> <p class="title is-5 mathjax"> Modification of Lattice Vibrations Spectrums in the Nanoparticles of Paradibrombenzol/Paradihlorbenzol Solid Solution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0910.3706v1-abstract-short" style="display: inline;"> Using Raman scattering, the solid solution nanoparticles of paradibrombenzol/paradihlorbenzol are investigated. It is found that in a spectrum of nanoparticles of solid solution frequencies of spectral lines are reduced in comparison with similar lines of a single crystal with the same concentration of components. Calculations of the lattice oscillations by Dyne's method are performed. It is sho… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.3706v1-abstract-full').style.display = 'inline'; document.getElementById('0910.3706v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0910.3706v1-abstract-full" style="display: none;"> Using Raman scattering, the solid solution nanoparticles of paradibrombenzol/paradihlorbenzol are investigated. It is found that in a spectrum of nanoparticles of solid solution frequencies of spectral lines are reduced in comparison with similar lines of a single crystal with the same concentration of components. Calculations of the lattice oscillations by Dyne's method are performed. It is shown that these modifications of frequencies can be caused by the increase of lattice parameters with the reduction of nanoparticles sizes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0910.3706v1-abstract-full').style.display = 'none'; document.getElementById('0910.3706v1-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 October, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2009. </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">2 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0806.2692">arXiv:0806.2692</a> <span> [<a href="https://arxiv.org/pdf/0806.2692">pdf</a>, <a href="https://arxiv.org/ps/0806.2692">ps</a>, <a href="https://arxiv.org/format/0806.2692">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/PhysRevB.78.132407">10.1103/PhysRevB.78.132407 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dynamics of magnetization in frustrated spin-chain systems: Ca$_3$Co$_2$O$_6$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kudasov%2C+Y+B">Yu. B. Kudasov</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A+S">A. S. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Pavlov%2C+V+N">V. N. Pavlov</a>, <a href="/search/cond-mat?searchtype=author&query=Maslov%2C+D+A">D. A. Maslov</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="0806.2692v1-abstract-short" style="display: inline;"> The magnetization dynamics of the triangular lattice of Ising spin chains is investigated in the framework of a two-dimensional model. The rigid chains are assumed to interact with the nearest neighboring chains, an external magnetic field, and a heat reservoir that causes the chains to change their states randomly with time. A probability of a single spin-flip process is assumed in a Glauber-li… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0806.2692v1-abstract-full').style.display = 'inline'; document.getElementById('0806.2692v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0806.2692v1-abstract-full" style="display: none;"> The magnetization dynamics of the triangular lattice of Ising spin chains is investigated in the framework of a two-dimensional model. The rigid chains are assumed to interact with the nearest neighboring chains, an external magnetic field, and a heat reservoir that causes the chains to change their states randomly with time. A probability of a single spin-flip process is assumed in a Glauber-like form. This technique allows describing properly the steps in the magnetization curves observed in Ca$_3$Co$_2$O$_6$ and their dependence on a magnetic field sweep rate and temperature. A transition from a low-temperature to high-temperature phase is also observed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0806.2692v1-abstract-full').style.display = 'none'; document.getElementById('0806.2692v1-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 June, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2008. </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">3.5 pages, 3 figures, submitted to PRB</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0709.2847">arXiv:0709.2847</a> <span> [<a href="https://arxiv.org/pdf/0709.2847">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Temperature Changes of Spectra of the Lattice and Surface Oscillations of Organic Molecular Nano-Crystals (COMPUTER Modeling) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0709.2847v1-abstract-short" style="display: inline;"> Dependence of frequency spectra of the lattice oscillations of organic nano-crystals on temperature is studied at presence of vacancies in structure. In a frequency spectrum a number of additional lines monotonously changing with temperature is observed. Also, the spectrum of the surface oscillations is calculated at temperature change. At the same time, the low-frequency line has non-linear beh… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.2847v1-abstract-full').style.display = 'inline'; document.getElementById('0709.2847v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0709.2847v1-abstract-full" style="display: none;"> Dependence of frequency spectra of the lattice oscillations of organic nano-crystals on temperature is studied at presence of vacancies in structure. In a frequency spectrum a number of additional lines monotonously changing with temperature is observed. Also, the spectrum of the surface oscillations is calculated at temperature change. At the same time, the low-frequency line has non-linear behavior with temperature change. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.2847v1-abstract-full').style.display = 'none'; document.getElementById('0709.2847v1-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> 18 September, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2007. </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">3 pages, 6 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/0709.2846">arXiv:0709.2846</a> <span> [<a href="https://arxiv.org/pdf/0709.2846">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Calculation of Spectra of the Lattice and Surface Vibrations of Organic Nano-Crystals </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0709.2846v1-abstract-short" style="display: inline;"> Calculations of frequencies of the lattice and surface oscillations of organic nano-crystals are carried out. As the sample the para-dichlorobenzol has been chosen. Change of spectra of oscillations from the sizes of nano-particles is found. It is shown that with the reduction of the sizes of nano-particles a spectrum of the surface oscillations prevailing. Calculations have shown that for the c… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.2846v1-abstract-full').style.display = 'inline'; document.getElementById('0709.2846v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0709.2846v1-abstract-full" style="display: none;"> Calculations of frequencies of the lattice and surface oscillations of organic nano-crystals are carried out. As the sample the para-dichlorobenzol has been chosen. Change of spectra of oscillations from the sizes of nano-particles is found. It is shown that with the reduction of the sizes of nano-particles a spectrum of the surface oscillations prevailing. Calculations have shown that for the correct interpretation of the observational spectra it is necessary to consider orientation disorder of the surface molecules and presence of vacancies in nano-particle volume. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.2846v1-abstract-full').style.display = 'none'; document.getElementById('0709.2846v1-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> 18 September, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2007. </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">2 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/0709.2845">arXiv:0709.2845</a> <span> [<a href="https://arxiv.org/pdf/0709.2845">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Manifestation of Defects in Raman Effect of Light Spectra of Organic Molecular Crystals (COMPUTER Modeling) </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0709.2845v1-abstract-short" style="display: inline;"> Calculations of frequency spectra for organic molecular crystals taking various defects in their structure into account are carried out. It is shown how the presence of the vacancies, orientation disorder, and surface presence affects spectra. It was found, that each defect has the characteristic set of lines in the spectra. </span> <span class="abstract-full has-text-grey-dark mathjax" id="0709.2845v1-abstract-full" style="display: none;"> Calculations of frequency spectra for organic molecular crystals taking various defects in their structure into account are carried out. It is shown how the presence of the vacancies, orientation disorder, and surface presence affects spectra. It was found, that each defect has the characteristic set of lines in the spectra. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.2845v1-abstract-full').style.display = 'none'; document.getElementById('0709.2845v1-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> 18 September, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2007. </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">2 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/0709.0066">arXiv:0709.0066</a> <span> [<a href="https://arxiv.org/pdf/0709.0066">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Modelling of the influence of nanostructures' sizes on lattice parameters </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0709.0066v1-abstract-short" style="display: inline;"> Computer modeling of formation of the one-dimensional and three-dimensional monatomic nanostructures by the method of atom-atom potentials was done. The arrangement of atoms was defined on the basis of the energy minimum. Our calculations have shown that the distance between the nearest atoms depends on number of atoms, thus atoms on boundary of grains of nanoparticles have more loose packing th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.0066v1-abstract-full').style.display = 'inline'; document.getElementById('0709.0066v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0709.0066v1-abstract-full" style="display: none;"> Computer modeling of formation of the one-dimensional and three-dimensional monatomic nanostructures by the method of atom-atom potentials was done. The arrangement of atoms was defined on the basis of the energy minimum. Our calculations have shown that the distance between the nearest atoms depends on number of atoms, thus atoms on boundary of grains of nanoparticles have more loose packing than in the volume. In three-dimensional nanostructures at reduction of their sizes increase of the disorder of atoms on positions is observed. Examination of model nanostructures constructed of bi-atomic molecules was also carried out. It is shown that distance between the nearest molecules and their orientation depend on number of molecules surrounding them. Molecules on boundary of grains of nanoparticles have more friable packing than in the volume. As in the linear chain, and three-dimensional nanostructures constructed of bi-atomic molecules, not only the disorder on positions of molecules depending on the sizes of nanoparticles, but also the orientation disorder is observed. At increase of the sizes of nanostructures the lattice in volume becomes more ordered than on boundaries of nanoparticles grains. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0709.0066v1-abstract-full').style.display = 'none'; document.getElementById('0709.0066v1-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 September, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2007. </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">3 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/0708.1826">arXiv:0708.1826</a> <span> [<a href="https://arxiv.org/pdf/0708.1826">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"> Methods for The Testing of Nanopowder </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=An%2C+V">V. An</a>, <a href="/search/cond-mat?searchtype=author&query=De+Izarra%2C+C">C. De Izarra</a>, <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+A">A. Korshunov</a>, <a href="/search/cond-mat?searchtype=author&query=Godimchuk%2C+A">A. Godimchuk</a>, <a href="/search/cond-mat?searchtype=author&query=Amelkovich%2C+Y">Y. Amelkovich</a>, <a href="/search/cond-mat?searchtype=author&query=Yablunovskii%2C+G">G. Yablunovskii</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="0708.1826v1-abstract-short" style="display: inline;"> Methods for the testing of nanopowders produced by wires electric explosion were considered. The following characteristics were proposed for the testing of nanopowders : main substance content, characteristic sizes of particles, specific surface area etc.. </span> <span class="abstract-full has-text-grey-dark mathjax" id="0708.1826v1-abstract-full" style="display: none;"> Methods for the testing of nanopowders produced by wires electric explosion were considered. The following characteristics were proposed for the testing of nanopowders : main substance content, characteristic sizes of particles, specific surface area etc.. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0708.1826v1-abstract-full').style.display = 'none'; document.getElementById('0708.1826v1-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 August, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2007. </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">Submitted on behalf of TIMA Editions (http://irevues.inist.fr/tima-editions)</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Dans European Nano Systems Worshop - ENS 2005, Paris : France (2005) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0707.2171">arXiv:0707.2171</a> <span> [<a href="https://arxiv.org/pdf/0707.2171">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Soft Condensed Matter">cond-mat.soft</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Other Condensed Matter">cond-mat.other</span> </div> </div> <p class="title is-5 mathjax"> Influence of Vacancies on the Nanoparticle Pulsation </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="0707.2171v1-abstract-short" style="display: inline;"> Computer modeling of the one-dimensional and three-dimensional nanoparticles with Van-der-Waals interaction was performed. The arrangement of atoms was defined on the grounds of an energy minimum. The calculations have shown that in the presence of vacancies in a nanoparticle and the account of a relaxation and oscillations the nanoparticle will pulse. This pulsation on distance between atoms of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0707.2171v1-abstract-full').style.display = 'inline'; document.getElementById('0707.2171v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0707.2171v1-abstract-full" style="display: none;"> Computer modeling of the one-dimensional and three-dimensional nanoparticles with Van-der-Waals interaction was performed. The arrangement of atoms was defined on the grounds of an energy minimum. The calculations have shown that in the presence of vacancies in a nanoparticle and the account of a relaxation and oscillations the nanoparticle will pulse. This pulsation on distance between atoms of a nanoparticle is observed in both one-dimensional and a three-dimensional cases. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0707.2171v1-abstract-full').style.display = 'none'; document.getElementById('0707.2171v1-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, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2007. </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">2 pages</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/cond-mat/0211540">arXiv:cond-mat/0211540</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0211540">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Disordered Systems and Neural Networks">cond-mat.dis-nn</span> </div> </div> <p class="title is-5 mathjax"> Influence of the Random Arrangement of Molecules on Energy of Vacancies Migration </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Korshunov%2C+M+A">M. A. Korshunov</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="cond-mat/0211540v1-abstract-short" style="display: inline;"> Calculation of energy of migration for number of molecular crystals consisting of centrosymmetrical and non-centrosymmetrical molecules was carried out by using a method of atom-atom potentials. It is shown, that the potential barrier is symmetrical for crystals consisting of centrosymmetrical molecules, but not symmetrical for the mixed crystals and crystals consisting of non-centrosymmetrical… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0211540v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0211540v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0211540v1-abstract-full" style="display: none;"> Calculation of energy of migration for number of molecular crystals consisting of centrosymmetrical and non-centrosymmetrical molecules was carried out by using a method of atom-atom potentials. It is shown, that the potential barrier is symmetrical for crystals consisting of centrosymmetrical molecules, but not symmetrical for the mixed crystals and crystals consisting of non-centrosymmetrical molecules. Thus it is possible to influence quantity of migration energy, growing the mixed crystals with a particular arrangement of components. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0211540v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0211540v1-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 November, 2002; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2002. </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">4 pages, 4 figures</span> </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> 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