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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/0909.5180">arXiv:0909.5180</a> <span> [<a href="https://arxiv.org/pdf/0909.5180">pdf</a>, <a href="https://arxiv.org/format/0909.5180">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.80.220411">10.1103/PhysRevB.80.220411 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spinon localization in the heat transport of the spin-1/2 ladder compound (C$_5$H$_{12}$N)$_2$CuBr$_4$ </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Mydosh%2C+J+A">J. A. Mydosh</a>, <a href="/search/cond-mat?searchtype=author&query=Thielemann%2C+B">B. Thielemann</a>, <a href="/search/cond-mat?searchtype=author&query=Ronnow%2C+H+M">H. M. Ronnow</a>, <a href="/search/cond-mat?searchtype=author&query=Ruegg%2C+C">Ch. Ruegg</a>, <a href="/search/cond-mat?searchtype=author&query=Kramer%2C+K">K. Kramer</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="0909.5180v1-abstract-short" style="display: inline;"> We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C$_5$H$_{12}$N)$_2$CuBr$_4$. The thermal conductivity $魏(B)$ is only weakly affected by the field-induced transitions between the gapless Luttinger-liquid state realized for $B_{c1}< B < B_{c2}$ and the gapped states, suggesting the absence of a direct contribution of the spin excitations to t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0909.5180v1-abstract-full').style.display = 'inline'; document.getElementById('0909.5180v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0909.5180v1-abstract-full" style="display: none;"> We present experiments on the magnetic field-dependent thermal transport in the spin-1/2 ladder system (C$_5$H$_{12}$N)$_2$CuBr$_4$. The thermal conductivity $魏(B)$ is only weakly affected by the field-induced transitions between the gapless Luttinger-liquid state realized for $B_{c1}< B < B_{c2}$ and the gapped states, suggesting the absence of a direct contribution of the spin excitations to the heat transport. We observe, however, that the thermal conductivity is strongly suppressed by the magnetic field deeply within the Luttinger-liquid state. These surprising observations are discussed in terms of localization of spinons within finite ladder segments and spinon-phonon umklapp scattering of the predominantly phononic heat transport. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0909.5180v1-abstract-full').style.display = 'none'; document.getElementById('0909.5180v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 September, 2009; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">4 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> PHYSICAL REVIEW B 80, 220411(R) (2009) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0811.2836">arXiv:0811.2836</a> <span> [<a href="https://arxiv.org/pdf/0811.2836">pdf</a>, <a href="https://arxiv.org/ps/0811.2836">ps</a>, <a href="https://arxiv.org/format/0811.2836">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.79.064406">10.1103/PhysRevB.79.064406 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Large thermomagnetic effects in weakly disordered Heisenberg chains </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Shimshoni%2C+E">E. Shimshoni</a>, <a href="/search/cond-mat?searchtype=author&query=Rasch%2C+D">D. Rasch</a>, <a href="/search/cond-mat?searchtype=author&query=Jung%2C+P">P. Jung</a>, <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Rosch%2C+A">A. Rosch</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="0811.2836v1-abstract-short" style="display: inline;"> The interplay of different scattering mechanisms can lead to novel effects in transport. We show theoretically that the interplay of weak impurity and Umklapp scattering in spin-1/2 chains leads to a pronounced dip in the magnetic field dependence of the thermal conductivity $魏$ at a magnetic field $B \sim T$. In sufficiently clean samples, the reduction of the magnetic contribution to heat tran… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0811.2836v1-abstract-full').style.display = 'inline'; document.getElementById('0811.2836v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0811.2836v1-abstract-full" style="display: none;"> The interplay of different scattering mechanisms can lead to novel effects in transport. We show theoretically that the interplay of weak impurity and Umklapp scattering in spin-1/2 chains leads to a pronounced dip in the magnetic field dependence of the thermal conductivity $魏$ at a magnetic field $B \sim T$. In sufficiently clean samples, the reduction of the magnetic contribution to heat transport can easily become larger than 50% and the effect is predicted to exist even in samples with a large exchange coupling, J >> B, where the field-induced magnetization is small. Qualitatively, our theory might explain dips at $B \sim T$ observed in recent heat transport measurements on copper pyrazine dinitrate, but a fully quantitative description is not possible within our model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0811.2836v1-abstract-full').style.display = 'none'; document.getElementById('0811.2836v1-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 November, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 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">5 pages, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 79, 064406 (2009) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0804.1318">arXiv:0804.1318</a> <span> [<a href="https://arxiv.org/pdf/0804.1318">pdf</a>, <a href="https://arxiv.org/ps/0804.1318">ps</a>, <a href="https://arxiv.org/format/0804.1318">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.78.121103">10.1103/PhysRevB.78.121103 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magneto-thermal evidence of a partial gap at the Fermi surface of UPt_2Si_2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Johannsen%2C+N">N. Johannsen</a>, <a href="/search/cond-mat?searchtype=author&query=Suellow%2C+S">S. Suellow</a>, <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Mydosh%2C+J+A">J. A. Mydosh</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="0804.1318v1-abstract-short" style="display: inline;"> Motivated by the observation of a giant Nernst effect in URu_2Si_2, the thermoelectric response of the related system UPt_2Si_2 was investigated using thermal and electric transport properties such as the Nernst and Seebeck effects, thermal conductivity, Hall effect and electrical resitivity. Unlike URu_2Si_2, UPt_2Si_2 is neither superconducting nor exhibits a ``hidden-order'' state. Neverthele… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0804.1318v1-abstract-full').style.display = 'inline'; document.getElementById('0804.1318v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0804.1318v1-abstract-full" style="display: none;"> Motivated by the observation of a giant Nernst effect in URu_2Si_2, the thermoelectric response of the related system UPt_2Si_2 was investigated using thermal and electric transport properties such as the Nernst and Seebeck effects, thermal conductivity, Hall effect and electrical resitivity. Unlike URu_2Si_2, UPt_2Si_2 is neither superconducting nor exhibits a ``hidden-order'' state. Nevertheless a pronounced Nernst effect anomaly is found to coincide with the onset of the antiferromagnetic order in UPt_2Si_2. Although the absolute values are substantially lower, its appearance and characteristics can favorably be compared to the giant Nernst effect in URu_2Si_2 indicating the common feature of a partial Fermi surface gap. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0804.1318v1-abstract-full').style.display = 'none'; document.getElementById('0804.1318v1-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 April, 2008; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 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">4 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/0712.3991">arXiv:0712.3991</a> <span> [<a href="https://arxiv.org/pdf/0712.3991">pdf</a>, <a href="https://arxiv.org/ps/0712.3991">ps</a>, <a href="https://arxiv.org/format/0712.3991">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/PhysRevLett.100.137202">10.1103/PhysRevLett.100.137202 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Field-dependent thermal transport in the Haldane chain compound NENP </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Mydosh%2C+J+A">J. A. Mydosh</a>, <a href="/search/cond-mat?searchtype=author&query=Rosch%2C+A">A. Rosch</a>, <a href="/search/cond-mat?searchtype=author&query=Shortsleeves%2C+K+C">K. C. Shortsleeves</a>, <a href="/search/cond-mat?searchtype=author&query=Turnbull%2C+M+M">M. M. Turnbull</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="0712.3991v2-abstract-short" style="display: inline;"> We present a study of the magnetic field-dependent thermal transport in the spin S=1 chain material Ni(C2H8N2)2NO2(ClO4) (NENP). The measured thermal conductivity is found to be very sensitive to the field-induced changes in the spin excitation spectrum. The magnetic contribution to the total heat conductivity is analyzed in terms of a quasiparticle model, and we obtain a temperature and momentu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0712.3991v2-abstract-full').style.display = 'inline'; document.getElementById('0712.3991v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0712.3991v2-abstract-full" style="display: none;"> We present a study of the magnetic field-dependent thermal transport in the spin S=1 chain material Ni(C2H8N2)2NO2(ClO4) (NENP). The measured thermal conductivity is found to be very sensitive to the field-induced changes in the spin excitation spectrum. The magnetic contribution to the total heat conductivity is analyzed in terms of a quasiparticle model, and we obtain a temperature and momentum independent mean free path. This implies that the motion of quasiparticles is effectively three dimensional despite the tiny interchain coupling. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0712.3991v2-abstract-full').style.display = 'none'; document.getElementById('0712.3991v2-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 April, 2008; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 December, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">4 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 100, 137202 (2008) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/0706.1463">arXiv:0706.1463</a> <span> [<a href="https://arxiv.org/pdf/0706.1463">pdf</a>, <a href="https://arxiv.org/ps/0706.1463">ps</a>, <a href="https://arxiv.org/format/0706.1463">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.76.020512">10.1103/PhysRevB.76.020512 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Nernst Effect in NdBa_2[Cu_{1-y}Ni_y]_3O_{7-未} </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Johannsen%2C+N">N. Johannsen</a>, <a href="/search/cond-mat?searchtype=author&query=Wolf%2C+T">Th. Wolf</a>, <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Freimuth%2C+A">A. Freimuth</a>, <a href="/search/cond-mat?searchtype=author&query=Mydosh%2C+J+A">J. A. Mydosh</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="0706.1463v1-abstract-short" style="display: inline;"> In NdBa_2[Cu_{1-y}Ni_y]_3O_{7-未}, magnetic Ni-impurities suppress Tc but at the same time the pseudogap is strongly enhanced. This unique feature makes it an ideal system to study possible relations between the anomalous Nernst effect, superconductivity and the pseudogap. We present Nernst effect measurements on a series of optimally doped (O_7) and underdoped (O_{6.8}) samples with Ni contents… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0706.1463v1-abstract-full').style.display = 'inline'; document.getElementById('0706.1463v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="0706.1463v1-abstract-full" style="display: none;"> In NdBa_2[Cu_{1-y}Ni_y]_3O_{7-未}, magnetic Ni-impurities suppress Tc but at the same time the pseudogap is strongly enhanced. This unique feature makes it an ideal system to study possible relations between the anomalous Nernst effect, superconductivity and the pseudogap. We present Nernst effect measurements on a series of optimally doped (O_7) and underdoped (O_{6.8}) samples with Ni contents ranging from y=0 to 0.12. In all samples an onset of the Nernst signal is found at T^谓> Tc. For the optimally doped samples T^谓and Tc decrease simultaneously with increasing Ni content. The underdoped samples show a different behavior, i.e. the onset of the Nernst signal is hardly affected by increasing the Ni content from y=0 to 0.03. Irrespective of the oxygen content, T^谓clearly does not track the enhanced pseudogap temperature T*. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('0706.1463v1-abstract-full').style.display = 'none'; document.getElementById('0706.1463v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 11 June, 2007; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2007. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 76, 020512(R) (2007) </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/0612486">arXiv:cond-mat/0612486</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0612486">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0612486">ps</a>, <a href="https://arxiv.org/format/cond-mat/0612486">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.98.107201">10.1103/PhysRevLett.98.107201 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Magnetothermal transport in the spin-1/2 chains of copper pyrazine dinitrate </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Berggold%2C+K">K. Berggold</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Rosch%2C+A">A. Rosch</a>, <a href="/search/cond-mat?searchtype=author&query=Shimshoni%2C+E">E. Shimshoni</a>, <a href="/search/cond-mat?searchtype=author&query=Phillips%2C+M+D">M. D. Phillips</a>, <a href="/search/cond-mat?searchtype=author&query=Turnbull%2C+M+M">M. M. Turnbull</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/0612486v2-abstract-short" style="display: inline;"> We present experiments on the thermal transport in the spin-1/2 chain compound copper pyrazine dinitrate Cu(C_4 H_4 N_2)(NO_3)_2. The heat conductivity shows a surprisingly strong dependence on the applied magnetic field B, characterized at low temperatures by two main features. The first one appearing at low B is a characteristic dip located at mu_B B ~ k_B T, that may arise from Umklapp scatte… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0612486v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0612486v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0612486v2-abstract-full" style="display: none;"> We present experiments on the thermal transport in the spin-1/2 chain compound copper pyrazine dinitrate Cu(C_4 H_4 N_2)(NO_3)_2. The heat conductivity shows a surprisingly strong dependence on the applied magnetic field B, characterized at low temperatures by two main features. The first one appearing at low B is a characteristic dip located at mu_B B ~ k_B T, that may arise from Umklapp scattering. The second one is a plateau-like feature in the quantum critical regime, mu_B |B-B_c| < k_B T, where B_c is the saturation field at T=0. The latter feature clearly points towards a momentum and field independent mean free path of the spin excitations, contrary to theoretical expectations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0612486v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0612486v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 March, 2007; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 December, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2006. </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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 98, 107201 (2007) </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/0611052">arXiv:cond-mat/0611052</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0611052">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0611052">ps</a>, <a href="https://arxiv.org/format/cond-mat/0611052">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/s10909-007-9317-x">10.1007/s10909-007-9317-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermal conductivity via magnetic excitations in spin-chain materials </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Freimuth%2C+A">A. Freimuth</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/0611052v1-abstract-short" style="display: inline;"> We discuss the recent progress and the current status of experimental investigations of spin-mediated energy transport in spin-chain and spin-ladder materials with antiferromagnetic coupling. We briefly outline the central results of theoretical studies on the subject but focus mainly on recent experimental results that were obtained on materials which may be regarded as adequate physical realiz… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0611052v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0611052v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0611052v1-abstract-full" style="display: none;"> We discuss the recent progress and the current status of experimental investigations of spin-mediated energy transport in spin-chain and spin-ladder materials with antiferromagnetic coupling. We briefly outline the central results of theoretical studies on the subject but focus mainly on recent experimental results that were obtained on materials which may be regarded as adequate physical realizations of the idealized theoretical model systems. Some open questions and unsettled issues are also addressed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0611052v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0611052v1-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 November, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2006. </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">17 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Low Temp. Phys. 147, 387 (2007) </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/0608143">arXiv:cond-mat/0608143</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0608143">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0608143">ps</a>, <a href="https://arxiv.org/format/cond-mat/0608143">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.74.184523">10.1103/PhysRevB.74.184523 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermal conductivity of Al-doped MgB2: Impurity scattering and the validity of the Wiedemann-Franz law </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Zhigadlo%2C+N+D">N. D. Zhigadlo</a>, <a href="/search/cond-mat?searchtype=author&query=Karpinski%2C+J">J. Karpinski</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</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/0608143v2-abstract-short" style="display: inline;"> We report data on the thermal conductivity K(T,H) along the basal plane of the hexagonal crystal structure of superconducting Mg{1-y}Al{y}B2 with y=0.02 and 0.07 at temperatures between 0.5 and 50 K and in external magnetic fields between 0 and 70 kOe. The substitution of Al for Mg leads to a substantial reduction of the heat transport via electronic quasiparticles. The analysis of the K(T,H) da… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0608143v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0608143v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0608143v2-abstract-full" style="display: none;"> We report data on the thermal conductivity K(T,H) along the basal plane of the hexagonal crystal structure of superconducting Mg{1-y}Al{y}B2 with y=0.02 and 0.07 at temperatures between 0.5 and 50 K and in external magnetic fields between 0 and 70 kOe. The substitution of Al for Mg leads to a substantial reduction of the heat transport via electronic quasiparticles. The analysis of the K(T,H) data implies that the Al impurities provoke an enhancement of the intraband scattering rate, almost equal in magnitude for both the sigma- and the pi band of electronic excitations. This is in contrast with conclusions drawn from analogous data sets for material in which carbon replaces boron and where mainly the intraband scattering rate of the sigma band is enhanced. Our complete data set, including additional results of measurements of the low-temperature thermal conductivity of pure MgB2, confirms the validity of the Wiedemann-Franz law for both pure and doped MgB2. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0608143v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0608143v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 November, 2006; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 August, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2006. </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, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 74, 184523 (2006) </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/0603586">arXiv:cond-mat/0603586</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0603586">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0603586">ps</a>, <a href="https://arxiv.org/format/cond-mat/0603586">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/PhysRevLett.97.115901">10.1103/PhysRevLett.97.115901 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Spin thermal conductivity of the Haldane chain compound Y2BaNiO5 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Kordonis%2C+K">K. Kordonis</a>, <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Lorenz%2C+T">T. Lorenz</a>, <a href="/search/cond-mat?searchtype=author&query=Cheong%2C+S+-">S. -W. Cheong</a>, <a href="/search/cond-mat?searchtype=author&query=Freimuth%2C+A">A. Freimuth</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/0603586v2-abstract-short" style="display: inline;"> We have measured the thermal conductivity of the spin S=1 chain compound Y2BaNiO5. Analyzing the anisotropy of the thermal transport allows to identify a definite spin-mediated thermal conductivity 魏_s along the chain direction. The calculated spin-related energy diffusion constant D_E(T) shows a broad peak around 120 K. Close to room temperature, D_E(T) approaches the theoretically predicted hi… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0603586v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0603586v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0603586v2-abstract-full" style="display: none;"> We have measured the thermal conductivity of the spin S=1 chain compound Y2BaNiO5. Analyzing the anisotropy of the thermal transport allows to identify a definite spin-mediated thermal conductivity 魏_s along the chain direction. The calculated spin-related energy diffusion constant D_E(T) shows a broad peak around 120 K. Close to room temperature, D_E(T) approaches the theoretically predicted high-temperature value, while scattering of spin excitations by magnetic impurities seems to be the major limiting factor of 魏_s at low temperature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0603586v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0603586v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 August, 2006; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 March, 2006; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2006. </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, 2 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 97, 115901 (2006) </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/0409110">arXiv:cond-mat/0409110</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0409110">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0409110">ps</a>, <a href="https://arxiv.org/format/cond-mat/0409110">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.71.020501">10.1103/PhysRevB.71.020501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Influence of carbon substitution on the heat transport in single crystalline MgB2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Zhigadlo%2C+N+D">N. D. Zhigadlo</a>, <a href="/search/cond-mat?searchtype=author&query=Kazakov%2C+S+M">S. M. Kazakov</a>, <a href="/search/cond-mat?searchtype=author&query=Karpinski%2C+J">J. Karpinski</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</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/0409110v2-abstract-short" style="display: inline;"> We report data on the thermal conductivity 魏(T,H) in the basal plane of hexagonal single-crystalline and superconducting Mg(B_{1-x}C_x)_2 (x= 0.03, 0.06) at temperatures between 0.5 and 50 K, and in external magnetic fields H between 0 and 50 kOe. The substitution of carbon for boron leads to a considerable reduction of the electronic heat transport, while the phonon thermal conductivity seems t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0409110v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0409110v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0409110v2-abstract-full" style="display: none;"> We report data on the thermal conductivity 魏(T,H) in the basal plane of hexagonal single-crystalline and superconducting Mg(B_{1-x}C_x)_2 (x= 0.03, 0.06) at temperatures between 0.5 and 50 K, and in external magnetic fields H between 0 and 50 kOe. The substitution of carbon for boron leads to a considerable reduction of the electronic heat transport, while the phonon thermal conductivity seems to be much less sensitive to impurities. The introduction of carbon enhances mostly the intraband scattering in the 蟽-band. In contrast to the previously observed anomalous behavior of pure MgB$_2$, the Wiedemann-Franz law is valid for Mg(B_0.94 C_0.06)_2 at low temperatures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0409110v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0409110v2-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 November, 2004; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 September, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2004. </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. Final version to appear in Phys. Rev. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 71, 020501(R) (2005) </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/0406522">arXiv:cond-mat/0406522</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0406522">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0406522">ps</a>, <a href="https://arxiv.org/format/cond-mat/0406522">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/10.1140/epjb/e2005-00013-y">10.1140/epjb/e2005-00013-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Anisotropic field dependence of the magnetic transition in Cu2Te2O5Br2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Dell%27Amore%2C+R">R. Dell'Amore</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Millet%2C+P">P. Millet</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/0406522v1-abstract-short" style="display: inline;"> We present the results of measurements of the thermal conductivity of Cu2Te2O5Br2, a compound where tetrahedra of Cu^{2+} ions carrying S=1/2 spins form chains along the c-axis of the tetragonal crystal structure. The thermal conductivity kappa was measured along both the c- and the a-direction as a function of temperature between 3 and 300 K and in external magnetic fields H up to 69 kOe, orien… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0406522v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0406522v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0406522v1-abstract-full" style="display: none;"> We present the results of measurements of the thermal conductivity of Cu2Te2O5Br2, a compound where tetrahedra of Cu^{2+} ions carrying S=1/2 spins form chains along the c-axis of the tetragonal crystal structure. The thermal conductivity kappa was measured along both the c- and the a-direction as a function of temperature between 3 and 300 K and in external magnetic fields H up to 69 kOe, oriented both parallel and perpendicular to the c-axis. Distinct features of kappa(T) were observed in the vicinity of T_N=11.4 K in zero magnetic field. These features are unaltered in external fields which are parallel to the c-axis, but are more pronounced when a field is applied perpendicularly to the c-axis. The transition temperature increases upon enhancing the external field, but only if the field is oriented along the a-axis. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0406522v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0406522v1-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 June, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2004. </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, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. B 42, 549 (2004) </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/0307383">arXiv:cond-mat/0307383</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0307383">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0307383">ps</a>, <a href="https://arxiv.org/format/cond-mat/0307383">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.68.094432">10.1103/PhysRevB.68.094432 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Diffusive energy transport in the S=1 Haldane chain compound AgVP2S6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Kazakov%2C+S+M">S. M. Kazakov</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Asano%2C+T">T. Asano</a>, <a href="/search/cond-mat?searchtype=author&query=Ajiro%2C+Y">Y. Ajiro</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/0307383v1-abstract-short" style="display: inline;"> We present the results of measurements of the thermal conductivity $魏$ of the spin S=1 chain compound AgVP_2S_6 in the temperature range between 2 and 300 K and with the heat flow directed either along or perpendicular to the chain direction. The analysis of the anisotropy of the heat transport allowed for the identification of a small but non-negligible magnon contribution $魏_m$ along the chain… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0307383v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0307383v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0307383v1-abstract-full" style="display: none;"> We present the results of measurements of the thermal conductivity $魏$ of the spin S=1 chain compound AgVP_2S_6 in the temperature range between 2 and 300 K and with the heat flow directed either along or perpendicular to the chain direction. The analysis of the anisotropy of the heat transport allowed for the identification of a small but non-negligible magnon contribution $魏_m$ along the chains, superimposed on the dominant phonon contribution $魏_ph$. At temperatures above about 100 K the energy diffusion constant D_E(T), calculated from the $魏_m(T)$ data, exhibits similar features as the spin diffusion constant D_S(T), previously measured by NMR. In this regime, the behaviour of both transport parameters is consistent with a diffusion process that is caused by interactions inherent to one-dimensional S=1 spin systems. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0307383v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0307383v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 July, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2003. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 68, 094432 (2003) </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/0307349">arXiv:cond-mat/0307349</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0307349">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0307349">ps</a>, <a href="https://arxiv.org/format/cond-mat/0307349">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.91.197005">10.1103/PhysRevLett.91.197005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Unusual magnetic field-induced phase transition in the mixed state of superconducting NbSe2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Landau%2C+I+L">I. L. Landau</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Bilusic%2C+A">A. Bilusic</a>, <a href="/search/cond-mat?searchtype=author&query=Smontara%2C+A">A. Smontara</a>, <a href="/search/cond-mat?searchtype=author&query=Berger%2C+H">H. Berger</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/0307349v1-abstract-short" style="display: inline;"> The thermal conductivity 魏in the basal plane of single-crystalline hexagonal NbSe2 has been measured as a function of magnetic field H, oriented both along and perpendicular to the c-axis, at several temperatures below T_c. With the magnetic field in the basal plane and oriented parallel to the heat flux we observed, in fields well below H_c2, an unexpected hysteretic behavior of 魏(H) with all t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0307349v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0307349v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0307349v1-abstract-full" style="display: none;"> The thermal conductivity 魏in the basal plane of single-crystalline hexagonal NbSe2 has been measured as a function of magnetic field H, oriented both along and perpendicular to the c-axis, at several temperatures below T_c. With the magnetic field in the basal plane and oriented parallel to the heat flux we observed, in fields well below H_c2, an unexpected hysteretic behavior of 魏(H) with all the generic features of a first order phase transition. The transition is not manifest in the 魏(H) curves, if H is still in the basal plane but oriented perpendicularly to the heat-flux direction. The origin of the transition is not yet understood. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0307349v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0307349v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 July, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2003. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 91, 197005 (2003) </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/0306094">arXiv:cond-mat/0306094</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0306094">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0306094">ps</a>, <a href="https://arxiv.org/format/cond-mat/0306094">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.68.132506">10.1103/PhysRevB.68.132506 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ambivalence of the anisotropy of the vortex lattice in an anisotropic type-II superconductor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Landau%2C+I+L">I. L. Landau</a>, <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</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/0306094v2-abstract-short" style="display: inline;"> We present a geometry-based discussion of possible vortex configurations in the mixed state of anisotropic type-II superconductors. It is shown that, if energy considerations assign six nearest neighbors to each vortex, two distinct modifications of the vortex lattice are possible. It is expected that certain conditions lead to a first order phase transition from one modification of the vortex l… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0306094v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0306094v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0306094v2-abstract-full" style="display: none;"> We present a geometry-based discussion of possible vortex configurations in the mixed state of anisotropic type-II superconductors. It is shown that, if energy considerations assign six nearest neighbors to each vortex, two distinct modifications of the vortex lattice are possible. It is expected that certain conditions lead to a first order phase transition from one modification of the vortex lattice to the other upon varying the external magnetic field. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0306094v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0306094v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 August, 2003; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 June, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2003. </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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 68, 132506 (2003) </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/0302573">arXiv:cond-mat/0302573</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0302573">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0302573">ps</a>, <a href="https://arxiv.org/format/cond-mat/0302573">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/10.1209/epl/i2003-00384-1">10.1209/epl/i2003-00384-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Universal behavior of spin-mediated energy transport in S=1/2 chain cuprates: BaCu2Si2O7 as an example </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Dhalenne%2C+G">G. Dhalenne</a>, <a href="/search/cond-mat?searchtype=author&query=Revcolevschi%2C+A">A. Revcolevschi</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/0302573v1-abstract-short" style="display: inline;"> The thermal conductivity of the spin-1/2 chain cuprate BaCu2Si2O7 was measured along different crystallographic directions in the temperature region between 0.5 and 300 K. The thermal conductivity along the chain direction considerably exceeds that along perpendicular directions. Near the antiferromagnetic transition at T_N = 9.2 K the data indicates enhanced scattering of phonons by critical fl… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0302573v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0302573v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0302573v1-abstract-full" style="display: none;"> The thermal conductivity of the spin-1/2 chain cuprate BaCu2Si2O7 was measured along different crystallographic directions in the temperature region between 0.5 and 300 K. The thermal conductivity along the chain direction considerably exceeds that along perpendicular directions. Near the antiferromagnetic transition at T_N = 9.2 K the data indicates enhanced scattering of phonons by critical fluctuations in the spin system. A comparison of the data above T_N with available results on similar materials reveals similarities in the main features of the temperature dependence of the mean free path of itinerant spin excitations. This universal behavior is most likely caused by the spin-lattice interaction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0302573v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0302573v1-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 February, 2003; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2003. </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</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Europhys. Lett. 62, 540 (2003) </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/0201517">arXiv:cond-mat/0201517</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0201517">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0201517">ps</a>, <a href="https://arxiv.org/format/cond-mat/0201517">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.66.014504">10.1103/PhysRevB.66.014504 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermal conductivity of single crystalline MgB_2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Jun%2C+J">J. Jun</a>, <a href="/search/cond-mat?searchtype=author&query=Kazakov%2C+S+M">S. M. Kazakov</a>, <a href="/search/cond-mat?searchtype=author&query=Karpinski%2C+J">J. Karpinski</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</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/0201517v3-abstract-short" style="display: inline;"> The ab-plane thermal conductivity $魏$ of single-crystalline hexagonal MgB_2 has been measured as a function of magnetic field H with orientations both parallel and perpendicular to the c-axis and at temperatures between 0.5 and 300 K. In the mixed state, $魏(H)$ measured at constant temperatures reveals features that are not typical for common type-II superconductors. The observed behavior may be… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0201517v3-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0201517v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0201517v3-abstract-full" style="display: none;"> The ab-plane thermal conductivity $魏$ of single-crystalline hexagonal MgB_2 has been measured as a function of magnetic field H with orientations both parallel and perpendicular to the c-axis and at temperatures between 0.5 and 300 K. In the mixed state, $魏(H)$ measured at constant temperatures reveals features that are not typical for common type-II superconductors. The observed behavior may be associated with the field-induced reduction of two superconducting energy gaps, significantly different in magnitude. A nonlinear temperature dependence of the electronic thermal conductivity is observed in the field-induced normal state at low temperatures. This behavior is at variance with the Wiedemann-Franz law, and suggests an unexpected instability of the electronic subsystem in the normal state at T ~ 1 K. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0201517v3-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0201517v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2002; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 January, 2002; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">9 pages,7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 66, 014504 (2002) </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/0112191">arXiv:cond-mat/0112191</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0112191">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0112191">ps</a>, <a href="https://arxiv.org/format/cond-mat/0112191">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.65.180505">10.1103/PhysRevB.65.180505 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Temperature dependence and anisotropy of the bulk upper critical field H_c2 of MgB_2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Jun%2C+J">J. Jun</a>, <a href="/search/cond-mat?searchtype=author&query=Kazakov%2C+S+M">S. M. Kazakov</a>, <a href="/search/cond-mat?searchtype=author&query=Karpinski%2C+J">J. Karpinski</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</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/0112191v2-abstract-short" style="display: inline;"> The bulk upper critical field H_{c2}(T) of superconducting MgB_2 and its anisotropy are established by analyzing experimental data on the temperature and magnetic field dependences of the ab-plane thermal conductivity of a single-crystalline sample in external magnetic fields oriented both parallel (H_{c2}^c) and perpendicular (H_{c2}^{ab}) to the c axis of the hexagonal lattice. From numerical… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0112191v2-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0112191v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0112191v2-abstract-full" style="display: none;"> The bulk upper critical field H_{c2}(T) of superconducting MgB_2 and its anisotropy are established by analyzing experimental data on the temperature and magnetic field dependences of the ab-plane thermal conductivity of a single-crystalline sample in external magnetic fields oriented both parallel (H_{c2}^c) and perpendicular (H_{c2}^{ab}) to the c axis of the hexagonal lattice. From numerical fits we deduce the anisotropy ratio 纬_0 = H_{c2}^{ab}(0) / H_{c2}^c(0)=4.2 at T=0 K. Both the values and the temperature dependences of H_{c2}^c and H_{c2}^{ab} are distinctly different from previous claims based on measurements of the electrical resistivity. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0112191v2-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0112191v2-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 February, 2002; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 December, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2001. </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> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 65, 180505(R) (2002) </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/0111273">arXiv:cond-mat/0111273</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0111273">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0111273">ps</a>, <a href="https://arxiv.org/format/cond-mat/0111273">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Superconductivity">cond-mat.supr-con</span> </div> </div> <p class="title is-5 mathjax"> Thermal and electrical transport in single crystalline MgB_2 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Jun%2C+J">J. Jun</a>, <a href="/search/cond-mat?searchtype=author&query=Kazakov%2C+S+M">S. M. Kazakov</a>, <a href="/search/cond-mat?searchtype=author&query=Karpinski%2C+J">J. Karpinski</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</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/0111273v1-abstract-short" style="display: inline;"> We present the results of measurements of the thermal and electrical conductivity in the basal plane of single-crystalline MgB_2 between 2 and 300 K. The analysis of the temperature dependence of the thermal conductivity gives supporting evidence for two different gaps on different sheets of the Fermi surface in the superconducting state. The zero-temperature values of the two gaps are D_1 (0) =… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0111273v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0111273v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0111273v1-abstract-full" style="display: none;"> We present the results of measurements of the thermal and electrical conductivity in the basal plane of single-crystalline MgB_2 between 2 and 300 K. The analysis of the temperature dependence of the thermal conductivity gives supporting evidence for two different gaps on different sheets of the Fermi surface in the superconducting state. The zero-temperature values of the two gaps are D_1 (0) = 5.3 meV and D_2 (0) = 1.65 meV. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0111273v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0111273v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 November, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2001. </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, 3 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/cond-mat/0104511">arXiv:cond-mat/0104511</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0104511">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0104511">ps</a>, <a href="https://arxiv.org/format/cond-mat/0104511">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"> Doping dependence of the electrical and thermal transport properties of CaB6 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Gianno%27%2C+K">K. Gianno'</a>, <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Bianchi%2C+A+D">A. D. Bianchi</a>, <a href="/search/cond-mat?searchtype=author&query=Fisk%2C+Z">Z. Fisk</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/0104511v1-abstract-short" style="display: inline;"> The thermoelectric power S and the thermal conductivity k of stoichiometric and vacancy-doped CaB6 have been measured between 5 and 300 K. The thermopower of both materials is surprisingly large at room temperature. Across the whole covered temperature range, S is negative and the temperature dependence is most likely dictated by band-structure effects. The empirical interpretation of our data i… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0104511v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0104511v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0104511v1-abstract-full" style="display: none;"> The thermoelectric power S and the thermal conductivity k of stoichiometric and vacancy-doped CaB6 have been measured between 5 and 300 K. The thermopower of both materials is surprisingly large at room temperature. Across the whole covered temperature range, S is negative and the temperature dependence is most likely dictated by band-structure effects. The empirical interpretation of our data involves a calculation of the thermoelectric power by using the Boltzmann equation in the relaxation-time approximation and the assumption of a defect band in the proximity of the lower edge of the conduction band. Good agreement with our data is found by considering acoustic-phonon and ionized-impurity scattering for the electrons in the conduction band which is well separated from the valence band. The thermal conductivity k(T), predominantly due to phonons, may also be described quite well across the whole covered temperature regime on the basis of a Debye-type relaxation-time approximation and assuming the concurring influence of boundary-, dislocation-, Rayleigh-, and resonant-scattering on the mean free path of the phonons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0104511v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0104511v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 26 April, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2001. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">18 pages, 8 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/cond-mat/0103419">arXiv:cond-mat/0103419</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0103419">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0103419">ps</a>, <a href="https://arxiv.org/format/cond-mat/0103419">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.64.054412">10.1103/PhysRevB.64.054412 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Heat transport by lattice and spin excitations in the spin chain compounds SrCuO_2 and Sr_2CuO_3 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Gianno%2C+K">K. Gianno</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Vietkine%2C+A">A. Vietkine</a>, <a href="/search/cond-mat?searchtype=author&query=Revcolevschi%2C+A">A. Revcolevschi</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/0103419v1-abstract-short" style="display: inline;"> We present the results of measurements of the thermal conductivity of the quasi one-dimensional spin S=1/2 chain compound SrCuO_2 in the temperature range between 0.4 and 300 K along the directions parallel and perpendicular to the chains. An anomalously enhanced thermal conductivity is observed along the chains. The analysis of the present data and a comparison with analogous recent results for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0103419v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0103419v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0103419v1-abstract-full" style="display: none;"> We present the results of measurements of the thermal conductivity of the quasi one-dimensional spin S=1/2 chain compound SrCuO_2 in the temperature range between 0.4 and 300 K along the directions parallel and perpendicular to the chains. An anomalously enhanced thermal conductivity is observed along the chains. The analysis of the present data and a comparison with analogous recent results for Sr_2CuO_3 and other similar materials demonstrates that this behavior is generic for cuprates with copper-oxygen chains and strong intrachain interactions. The observed anomalies are attributed to the one-dimensional energy transport by spin excitations (spinons), limited by the interaction between spin and lattice excitations. The energy transport along the spin chains has a non-diffusive character, in agreement with theoretical predictions for integrable models. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0103419v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0103419v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 March, 2001; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2001. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages (RevTeX), 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 64, 054412 (2001) </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/0007359">arXiv:cond-mat/0007359</a> <span> [<a href="https://arxiv.org/pdf/cond-mat/0007359">pdf</a>, <a href="https://arxiv.org/ps/cond-mat/0007359">ps</a>, <a href="https://arxiv.org/format/cond-mat/0007359">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Strongly Correlated Electrons">cond-mat.str-el</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevB.62.R6108">10.1103/PhysRevB.62.R6108 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Thermal conductivity and specific heat of the linear chain cuprate Sr$_{2}$CuO$_{3}$: Evidence for thermal transport via spinons </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/cond-mat?searchtype=author&query=Sologubenko%2C+A+V">A. V. Sologubenko</a>, <a href="/search/cond-mat?searchtype=author&query=Felder%2C+E">E. Felder</a>, <a href="/search/cond-mat?searchtype=author&query=Gianno%2C+K">K. Gianno</a>, <a href="/search/cond-mat?searchtype=author&query=Ott%2C+H+R">H. R. Ott</a>, <a href="/search/cond-mat?searchtype=author&query=Vietkine%2C+A">A. Vietkine</a>, <a href="/search/cond-mat?searchtype=author&query=Revcolevschi%2C+A">A. Revcolevschi</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/0007359v1-abstract-short" style="display: inline;"> We report measurements of the specific heat and the thermal conductivity of the model Heisenberg spin-1/2 chain cuprate Sr$_{2}$CuO$_{3}$ at low temperatures. In addition to a nearly isotropic phonon heat transport, we find a quasi one-dimensional excess thermal conductivity along the chain direction, most likely associated with spin excitations (spinons). The spinon energy current is limited ma… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0007359v1-abstract-full').style.display = 'inline'; document.getElementById('cond-mat/0007359v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="cond-mat/0007359v1-abstract-full" style="display: none;"> We report measurements of the specific heat and the thermal conductivity of the model Heisenberg spin-1/2 chain cuprate Sr$_{2}$CuO$_{3}$ at low temperatures. In addition to a nearly isotropic phonon heat transport, we find a quasi one-dimensional excess thermal conductivity along the chain direction, most likely associated with spin excitations (spinons). The spinon energy current is limited mainly by scattering on defects and phonons. Analyzing the specific heat data, the intrachain magnetic exchange $J/k_{B}$ is estimated to be 2650 K. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('cond-mat/0007359v1-abstract-full').style.display = 'none'; document.getElementById('cond-mat/0007359v1-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 July, 2000; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2000. </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 RevTeX pages, 3 figures, to appear in Phys. Rev. B</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. B 62, R6108 (2000) </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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