Equilibrium edge spin currents in two-dimensional electron systems with spin-orbit interaction

被引：17

作者：

Sablikov, Vladimir A. ^{[1
]}

Sukhanov, Aleksei A. ^{[1
]}

Tkach, Yurii Ya. ^{[1
]}

机构：

[1] Russian Acad Sci, Kotelnikov Inst Radio Engn & Elect, Fryazino 141190, Russia

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.78.153302

中图分类号：

T [工业技术];

学科分类号：

08 ;

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.

引用

页数：4

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