论文标题
粘性电子流体的Poiseuille流动成像
Spin imaging of Poiseuille flow of viscous electronic fluid
论文作者
论文摘要
在制造具有少量缺陷的高质量导体的最新进展已引发了粘性电子流体的研究，并激发了人们寻找电子传输流体动力学状态的证据。在这项工作中，我们提出了旋转成像技术，使我们能够证明电子流动流的出现。基于数值计算，我们证明当粘性电子流体形成Poiseuille流动时，注射的电子自旋密度在整个通道上是不均匀的。我们还认为，横跨通道的不同位置的Hanle曲线是由于不均匀流体动力流中电子漂移速度变化而产生的相对相移。研究的效果可用于证据并非侵入性地研究粘性电子流体。
Recent progress in fabricating high-quality conductors with small densities of defects has initiated the studies of the viscous electron fluid and has motivated the search for the evidences of the hydrodynamic regime of electron transport. In this work we come up with the spin imaging technique allowing us to attest to the emergence of electron hydrodynamic flows. Based on numerical calculations we demonstrate that the injected electron spin density is inhomogeneous across the channel when the viscous electron fluid forms the Poiseuille flow. We also argue that the Hanle curves at different positions across the channel acquire relative phase shifts resulting from the variation of the electron drift velocity in inhomogeneous hydrodynamic flows. The studied effects can be employed to evidence and study the viscous electron fluid non-invasively.
