论文标题
石墨烯霍尔棒设备中的流体动力电子传输
Hydrodynamic electron transport in graphene Hall-bar devices
论文作者
论文摘要
我们考虑在Hall-Bar几何形状中的流体动力电子传输。该理论是针对具有非galian不变电子液体的系统开发的。我们表明，由远距离疾病引起的电子密度的不均匀性导致流体动力传输模式与相对于电子液体的传输之间的混合。对于近电荷中立性的石墨烯系统，这些效应导致水动力流动的强耦合到电荷转运。结果，系统的有效电导率可能会显着超过电子液体的内在电导率。我们获得了系统的热电运输系数的分析表达式，这是清洁和无序控制方案之间的整个交叉区域中密度的函数。
We consider hydrodynamic electron transport in the Hall-bar geometry. The theory is developed for systems with non-Galilean-invariant electron liquids. We show that inhomogeneity of the electron density induced by long-range disorder and gating leads to mixing between the hydrodynamic transport mode and transport relative to the electron liquid. For graphene systems near charge neutrality, these effects lead to strong coupling of the hydrodynamic flow to charge transport. As a result, the effective electrical conductivity of the system may significantly exceed the intrinsic conductivity of the electron liquid. We obtain analytic expressions for the thermoelectric transport coefficients of the system as a function of density in the full crossover region between clean and disorder-dominated regimes.
