论文标题
单层石墨烯中的自旋霍尔角
Spin Hall angle in single-layer graphene
论文作者
论文摘要
我们研究了具有无序和界面诱导的自旋轨道耦合的单层石墨烯设备中的自旋大厅效应。我们的石墨烯设备连接到四个半无限引线，这些铅嵌入到{landauer-büttiker}设置中以进行量子传输。我们表明，石墨烯设备的旋转大厅角表现出类似于金属设备的介质波动。此外，{最大旋转霍尔角偏差}和无量纲纵向电导率之间的产物遵循通用关系$θ_{sh} \ timesσ= 0.18 $。最后，我们将通用关系与最新的实验数据以及紧密结合模型的数值实验空间模拟进行了比较。
We investigate the spin Hall effect in a single-layer graphene device with disorder and interface-induced spin-orbit coupling. Our graphene device is connected to four semi-infinite leads that are embedded in a {Landauer-Büttiker} setup for quantum transport. We show that the spin Hall angle of graphene devices exhibits mesoscopic fluctuations that are similar to metal devices. Furthermore, the product between the {maximum spin Hall angle deviation} and dimensionless longitudinal conductivity follows a universal relationship $Θ_{sH} \times σ= 0.18$. Finally, we compare the universal relation with recent experimental data and numerically exact real-space simulations from the tight-binding model.
