论文标题
山谷流体动力学中的石墨烯
Valley hydrodynamics in gapped graphene
论文作者
论文摘要
最近的实验表明，与电子的流体动力描述一致的新型非平衡状态是在具有山谷自由度的超纯石墨烯中实现的。在这里，我们通过采用微极流体的概念来制定电子流体力学理论，包括山谷角动量的耗散过程。结果，我们的理论提出了一种新型策略，以通过微连续性产生山谷极化。我们发现旋转粘度会引起纵向谷电流，这是电场中二阶的。
Recent experiments have revealed that novel nonequilibrium states consistent with the hydrodynamic description of electrons are realized in ultrapure graphene, which hosts the valley degrees of freedom. Here, we formulate a theory of electron hydrodynamics including dissipation processes of the valley angular momentum by employing the concept of micropolar fluids. As a result, our theory proposes a novel strategy to generate a valley polarization by the microrotation. We uncover that the rotational viscosity induces longitudinal valley currents which are second order in electric fields.
