论文标题
界面驱动的电磁系统各向异性
Interface-driven electrical magnetochiral anisotropy in Pt/PtMnGa bilayers
论文作者
论文摘要
在手性导体中通常被称为电磁性偶极性（EMCA）的非偏射电荷转运，它触及了现代冷凝物理物理学的最重要元素。在这里，我们研究了PT/PTMNGA（PMG）双层中的EMCA，并助理了非平衡波动定理。 PT/PMG双层中的大型EMCA可以归因于接口驱动的手性传输通道的非偏置响应。由于小电流区域存在较大的电荷波动，因此应添加高阶EMCA系数，并且它们都是电流的功能。不对称电子散射和自旋依赖性散射的组合提供了PT/PMG双层中PMG厚度依赖性手性转运行为。 PMG的巨大增强的异常大厅角进一步通过强旋转轨道耦合进一步证明了经过修改的表面状态。
Nonreciprocal charge transport, which is frequently termed as electrical magnetochiral anisotropy (EMCA) in chiral conductors, touches the most important elements of modern condensed matter physics. Here, we have investigated the EMCA in Pt/PtMnGa (PMG) bilayers with the assitance of nonequilibrium fluctuation theorems. Large EMCA in the Pt/PMG bilayers can be attributed to nonreciprocal response of an interface-driven chiral transport channel. Due to the presence of large charge fluctuations for small current region, higher order EMCA coefficients should be added and they are all functions of current. A combination of asymmetrical electron scattering and spin-dependent scattering furnish the PMG thickness dependent chiral transport behaviors in Pt/PMG bilayers. The dramatically enhanced anomalous Hall angle of PMG further demonstrates the modified surface state properties by strong spin-orbit coupling.
