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相关论文: Towards flavour diffusion coefficient and electric…

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We introduce a model whose thermal conductivity diverges in dimension 1 and 2, while it remains finite in dimension 3. We consider a system of oscillators perturbed by a stochastic dynamics conserving momentum and energy. We compute thermal…

统计力学 · 物理学 2009-03-04 Giada Basile , Cedric Bernardin , Stefano Olla

By combining ab initio quantum mechanics calculation and Drude model, electron temperature and lattice temperature dependent electron thermal conductivity is calculated and implemented into a multiscale model of laser material interaction,…

计算物理 · 物理学 2016-11-07 Pengfei Ji , Yuwen Zhang

We study the contribution of advection by thermal velocity fluctuations to the effective diffusion coefficient in a mixture of two indistinguishable fluids. The enhancement of the diffusive transport depends on the system size L and grows…

介观与纳米尺度物理 · 物理学 2015-05-27 A. Donev , A. de la Fuente , J. B. Bell , A. L. Garcia

ZrTe$_5$ is considered a potential candidate for either a Dirac semimetal or a topological insulator in close proximity to a topological phase transition. Recent optical conductivity results motivated a two-band model with a conical…

介观与纳米尺度物理 · 物理学 2020-10-26 Corentin Morice , Elias Lettl , Thilo Kopp , Arno P. Kampf

A lattice calculation is presented for the electrical conductivity of the QCD plasma with 2+1 dynamical flavours at nonzero temperature. We employ the conserved lattice current on anisotropic lattices using a tadpole-improved clover action…

高能物理 - 格点 · 物理学 2013-10-29 Alessandro Amato , Gert Aarts , Chris Allton , Pietro Giudice , Simon Hands , Jon-Ivar Skullerud

We use the quasiclassical theory of superconductivity to calculate the electronic contribution to the thermal conductivity. The theory is formulated for low temperatures when heat transport is limited by electron scattering from random…

凝聚态物理 · 物理学 2009-10-28 M. J. Graf , S. -K. Yip , J. A. Sauls , D. Rainer

We report an unconventional temperature dependence of the resistivity in several strongly correlated systems approaching a localized to itinerant electronic transition from the itinerant electron side. The observed resistivity, proportioanl…

强关联电子 · 物理学 2009-11-10 F. Rivadulla , J. -S. Zhou , J. B. Goodenough

The electrical conductivity of the switching channel of vanadium dioxide thin-film sandwich structures is studied over a wide temperature range (15-300 K). It is shown that the electrical resistance of the channel varies with temperature as…

材料科学 · 物理学 2020-01-10 Alexander Pergament , Petr Boriskov , Nikolai Kuldin , Andrei Velichko

We analyze the short-time behavior of the heat and charge currents through nanoscale conductors exposed to a temperature gradient. To this end, we employ Luttinger's thermomechanical potential to simulate a sudden change of temperature at…

介观与纳米尺度物理 · 物理学 2016-04-25 F. G. Eich , M. Di Ventra , G. Vignale

Transport properties of a single-channel Luttinger liquid impinging on a barrier have been studied for $g=1/2 - \epsilon$, where $g$ is the dimensionless interaction constant and $|\epsilon| \ll 1$. The relevant diagrams contributing to the…

凝聚态物理 · 物理学 2007-05-23 R. Egger , M. Sassetti , U. Weiss

We study the density of states and the optical conductivity of a Kondo lattice which is immersed in a massless Dirac Fermi sea, as characterized by a linear dispersion relation. As a result of the hybridization $V$ with the $f$-electron…

强关联电子 · 物理学 2015-07-16 Hyunyong Lee , Stefan Kettemann

A tunable conductivity has been achieved by controllable substitution of a novel UV light activated electronic conductor. The transparent conducting oxide system H-doped Ca12-xMgxAl14O33 (x = 0; 0.1; 0.3; 0.5; 0.8; 1.0) presents a…

材料科学 · 物理学 2009-11-10 M. I. Bertoni , T. O. Mason , J. E. Medvedeva , A. J. Freeman , K. R. Poeppelmeier , B. Delley

We study the thermal static potential for (2+1)-flavor QCD at nonzero density through a Taylor expansion around vanishing chemical potentials. From Taylor expanded Wilson line correlators, we extract the $\hat{\mu}^2$ coefficient of the…

高能物理 - 格点 · 物理学 2026-04-01 Jishnu Goswami , Dibyendu Bala , Olaf Kaczmarek

We study heat and charge transport through a normal diffusive wire coupled with a superconducting wire over the region smaller than the coherence length. Due to partial Andreev reflection of quasiparticles from the interface, the subgap…

超导电性 · 物理学 2014-12-03 E. V. Bezuglyi , V. Vinokur

By studying the temperature-dependent behavior of electron thermal conductivity (k) in a 3.2 nm-thin film, we quantify the extremely confined defect-electron scattering and reveal the intrinsic phonon-electron scattering that is shared by…

介观与纳米尺度物理 · 物理学 2015-01-16 Zhe Cheng , Zaoli Xu , Shen Xu , Xinwei Wang

We discuss the thermal conductivity of a chain of coupled rotators, showing that it is the first example of a 1d nonlinear lattice exhibiting normal transport properties in the absence of an on-site potential. Numerical estimates obtained…

chao-dyn · 物理学 2009-10-31 C. Giardina' , R. Livi , A. Politi , M. Vassalli

We study the dependence of the electric conductivity on chemical potential in finite-density $SU(2)$ gauge theory with $N_f = 2$ flavours of rooted staggered sea quarks, in combination with Wilson-Dirac and Domain Wall valence quarks. The…

高能物理 - 格点 · 物理学 2020-11-25 P. V. Buividovich , D. Smith , L. von Smekal

We perform broadband phase sensitive measurements of the reflection coefficient from 45 MHz up to 20 GHz employing a vector network analyzer with a 2.4 mm coaxial sensor which is terminated by the sample under test. While the material…

材料科学 · 物理学 2008-05-12 Elvira Ritz , Martin Dressel

The temperature dependences of the Hall coefficient and electrical resistivity recently measured by Moser et al. [Phys. Rev. Lett. 84, 2674 (2000)] in the quasi-one-dimensional organic conductor (TMTSF)2PF6 are quantitatively compared with…

强关联电子 · 物理学 2007-05-23 Victor M. Yakovenko , Anatoley T. Zheleznyak

We revisit a model describing Seebeck effect on a weak link between two charge Kondo circuits, which has been proposed in the [Phys. Rev. B 97, 085403 (2018)]. We calculate the thermoelectric coefficients in the perturbation theory assuming…

介观与纳米尺度物理 · 物理学 2022-10-25 T. K. T. Nguyen , M. N. Kiselev