论文标题
粘性电子流体的库仑阻力：阻力粘度和负电导率
Coulomb drag of viscous electron fluids: drag viscosity and negative drag conductivity
论文作者
论文摘要
我们表明，库仑在流体动力双层系统中的阻力导致流体动力方程式中的其他粘度项，即除了著名的运动学和霍尔粘度外，也会导致阻力和阻力棒粘度。这些新的粘度术语是由于层间相互作用引起的应力张量的变化而产生的。所有四个粘度项都可以通过改变两层的施加磁场和电子密度来调整。在两层电子密度之间的一定比率下，阻力粘度极大地改变了纵向转运，导致了负电导率。
We show that Coulomb drag in hydrodynamic bilayer systems leads to additional viscosity terms in the hydrodynamic equations, i.e., the drag and drag-Hall viscosities, besides the well-known kinematic and Hall viscosities. These new viscosity terms arise from a change of the stress tensor due to the interlayer Coulomb interactions. All four viscosity terms are tunable by varying the applied magnetic field and the electron densities in the two layers. At certain ratios between the electron densities in the two layers, the drag viscosity dramatically changes the longitudinal transport resulting in a negative drag conductivity.
