论文标题
双层石墨烯中两流不稳定性引起的电导抑制
Conductance suppression due to two-stream instability in bilayer graphene
论文作者
论文摘要
我们研究了在流体动力学方面的内在双层石墨烯中的电子孔两流不稳定性（或库仑阻力），这构成了温度，初始漂移速度，磁场和碰撞的影响。不稳定性发作的阈值漂移速度是载体热速度的顺序。我们证明了一种前所未有的纯静电机制，导致了当前的放松，从而产生了明确的DC纵向电导率$ \ propto t^{3/2} $。由于静电和碰撞过程之间的竞争，确定了两个不同的运输方式。对霍尔电导率的分析表明，两流不稳定性效应也纠正了线性响应理论中获得的最新结果。
We investigate the electron-hole two-stream instability (or Coulomb drag) in intrinsic bilayer graphene in the hydrodynamic regime, accounting for the effects of temperature, initial drift velocity, magnetic field, and collisions. The threshold drift speed for the onset of instabilities is of the order of the thermal velocity of the carriers. We put in evidence an unprecedented purely electrostatic mechanism leading to current relaxation, giving rise to a well-defined dc longitudinal conductivity $\propto T^{3/2}$. Due to competition between electrostatic and collisional processes, two distinct transport regimes are identified. An analysis on the Hall conductivity revealed that the two-stream instability effects also correct the most recent results obtained within the linear response theory.
