Rashba spin splitting in two-dimensional electron and hole systems
Rashba spin splitting in two-dimensional electron and hole systems
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DOI：
10.1103/physrevb.62.4245
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发表时间：
2000-02
影响因子：
3.7
通讯作者：
R. Winkler
中科院分区：
文献类型：
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作者：
R. Winkler
在二维（2D）空穴系统中，反转不对称引起的自旋分裂与我们熟悉的传导带中的自旋分裂有显著不同。电子态的Rashba自旋分裂随着面内波矢量${k}_{\ensuremath{\Vert}}线性增加，而重空穴态的自旋分裂在${k}_{\ensuremath{\Vert}}$中可以达到三阶，因此在二维小空穴密度的极限下，自旋分裂可以忽略不计。我们在最近关于在二维系统中观察到的金属-绝缘体转变起源的争论的背景下讨论这种行为的后果。
In two-dimensional (2D) hole systems the inversion asymmetry induced spin splitting differs remarkably from its familiar counterpart in the conduction band. While the so-called Rashba spin splitting of electron states increases linearly with in-plane wave vector ${k}_{\ensuremath{\Vert}},$ the spin splitting of heavy-hole states can be of third order in ${k}_{\ensuremath{\Vert}}$ so that spin splitting becomes negligible in the limit of small 2D hole densities. We discuss consequences of this behavior in the context of recent arguments on the origin of the metal-insulator transition observed in 2D systems.