Vorticity of viscous electronic flow in graphene
Vorticity of viscous electronic flow in graphene
复制标题
石墨烯中粘性电子流的涡度
DOI：
10.1088/2053-1583/ab7bfa
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发表时间：
2019
期刊：
影响因子：
5.5
通讯作者：
B. Narozhny
中科院分区：
文献类型：
--
作者：
S. Danz;B. Narozhny
在超纯材料中，电子可能会表现出类似于粘性流体的流体动力学流动的集体运动，这种现象在从黑洞到高温超导的许多物体系统中具有深远的影响。然而，对这种有趣行为的最终检测仍然难以捉摸。直到最近，观察固体流体动力学行为的实验技术都是基于测量宏观输运性质，如“非局部”（或“邻近”）阻力，这可能允许其他解释。今年早些时候，两项突破性的实验展示了两种不同的成像技术，使直接“观察”电子流成为可能。我们证明了在一个长的霍尔酒吧（在没有磁场的情况下）的流体动力学流动表现出一个非平凡的涡旋结构伴随着一个符号交替的非局部阻力。对这种独特流型的实验观察可以为电子流体动力学提供明确的证据。
In ultra-pure materials electrons may exhibit a collective motion similar to the hydrodynamic flow of a viscous fluid, the phenomenon with far reaching consequences in a wide range of many body systems from black holes to high-temperature superconductivity. Yet the definitive detection of this intriguing behavior remains elusive. Until recently, experimental techniques for observing hydrodynamic behavior in solids were based on measuring macroscopic transport properties, such as the ‘nonlocal’ (or ‘vicinity’) resistance, which may allow alternative interpretation. Earlier this year two breakthrough experiments demonstrated two distinct imaging techniques making it possible to ‘observe’ the electronic flow directly. We demonstrate that a hydrodynamic flow in a long Hall bar (in the absence of magnetic field) exhibits a nontrivial vortex structure accompanied by a sign-alternating nonlocal resistance. An experimental observation of such unique flow pattern could serve a definitive proof of electronic hydrodynamics.
石墨烯中不平衡电子空穴液体的负粘度和涡流
影响因子：
3.7
作者：
Xie, Hong-Yi;Levchenko, Alex
通讯作者：
Levchenko, Alex
影响因子：
5.7
作者：
Jaoui, Alexandre;Fauque, Benoit;Behnia, Kamran
通讯作者：
Behnia, Kamran