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Equilibrium Edge Spin Currents In Two-dimensional Electron Systems With Spin-orbit Interaction

机译:具有自旋轨道相互作用的二维电子系统中的平衡边缘自旋电流

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摘要

We find a specific mechanism of background spin currents in two-dimensional electron systems with spatially nonuniform spin-orbit interaction (SOI) at thermodynamic equilibrium, in particular, in the systems consisting of regions with and without SOI. The spin density flows tangentially to the boundary in the normal and SOI regions within a layer of the width determined by the SOI strength. The density of these edge currents significantly exceeds the bulk spin current density. The spin current is polarized normally to the boundary. The spatial distribution of equilibrium spin currents is investigated in detail in the case of a steplike variation of the SOI strength and potential at the interface.
机译:我们发现在热力学平衡时具有空间非均匀自旋轨道相互作用(SOI)的二维电子系统中,特别是在具有和不具有SOI的区域组成的系统中,背景自旋电流的具体机制。自旋密度与由SOI强度确定的宽度层中的法向和SOI区域中的边界相切地流动。这些边缘电流的密度大大超过整体自旋电流密度。自旋电流垂直极化到边界。在界面处SOI强度和电势呈阶梯状变化的情况下,将详细研究平衡自旋电流的空间分布。

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