论文标题
当前驱动的磁化磁力逆转在轨道Chern绝缘子中
Current Driven Magnetization Reversal in Orbital Chern Insulators
论文作者
论文摘要
具有平坦Moiré迷你班的石墨烯多层可以表现出量化的异常霍尔效应，这是由于自发山谷极化和拓扑非安装谷谷射线带的综合影响。这些Chern绝缘子中大厅效应的迹象可以通过应用外部磁场或通过系统驱动传输电流来逆转。 We propose a current-driven mechanism whereby reversal occurs along lines in the (current $I$, magnetic-field $B$) control parameter space with slope $dI/dB = (e/h)\, M A_{M} \, (1-γ^2)/γ$, where $M$ is the magnetization, $A_M$ is the moiré unit cell area, and $γ<1$ is the ratio of the chemical potential沿域墙到电气偏置$ ev $的山谷之间的差异。
Graphene multilayers with flat moiré minibands can exhibit the quantized anomalous Hall effect due to the combined influence of spontaneous valley polarization and topologically non-trival valley-projected bands. The sign of the Hall effect in these Chern insulators can be reversed either by applying an external magnetic field, or by driving a transport current through the system. We propose a current-driven mechanism whereby reversal occurs along lines in the (current $I$, magnetic-field $B$) control parameter space with slope $dI/dB = (e/h)\, M A_{M} \, (1-γ^2)/γ$, where $M$ is the magnetization, $A_M$ is the moiré unit cell area, and $γ<1$ is the ratio of the chemical potential difference between valleys along a domain wall to the electrical bias $eV$.
