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arXiv 1708.02759cond-mat.str-elcond-mat.mes-hallcond-mat.mtrl-scihep-thquant-ph
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各向异性Dirac流体的出界流体动力学

Out-of-bounds hydrodynamics in anisotropic Dirac fluids

Julia M. Link, Boris N. Narozhny, Egor I. Kiselev, Jörg Schmalian

摘要:

我们研究了在电荷中性处具有合并狄拉克点的二维相互作用电子系统的流体动力学行为。沿一个结晶方向的色散是Dirac-like的,而它是牛顿的正交方向。因此,导电性在一个方向上是金属的,而在另一个方向上是绝缘的。剪切粘度张量的一个元素违反了剪切粘度与熵密度之比的著名下限,这种效应可以通过各向异性热哈根-普瓦维尔流来探测。

英文摘要:

We study the hydrodynamic behavior in two-dimensional, interacting electronic systems with merging Dirac points at charge neutrality. The dispersion along one crystallographic direction is Dirac-like, while it is Newtonian-like in the orthogonal direction. As a result, the electrical conductivity is metallic in one and insulating in the other direction. One element of the shear viscosity tensor violates the famous lower bound for the shear viscosity to entropy density ratio,an effect that can be probed via anisotropic thermal Hagen- Poiseuille flow.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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