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Rashba spin splitting in quantum wires

机译:量子线中的Rashba自旋分裂

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This article presents an overview of results pertaining to electronic structure, transport properties, and interaction effects in ballistic quantum wires with Rashba spin splitting. Limits of weak and strong spin-orbit coupling are distinguished, and spin properties of the electronic states elucidated. The case of strong Rashba spin splitting where the spin-precession length is comparable to the wire width turns out to be particularly interesting. Hybridization of spin-split quantum-wire subbands leads to an unusual spin structure where the direction of motion for electrons can fix their spin state. This peculiar property has important ramifications for linear transport in the quantum wire, giving rise to spin accumulation without magnetic fields or ferromagnetic contacts. A description for interacting Rashba-split quantum wires is developed, which is based on a generalization of the Tomonaga-Luttinger model. (C) 2004 Elsevier Ltd. All rights reserved.
机译:本文概述了具有Rashba自旋分裂的弹道量子线中的电子结构,输运性质和相互作用效应的结果。区分了弱和强自旋轨道耦合的极限,并阐明了电子态的自旋特性。事实证明,自旋进动长度与导线宽度相当的强Rashba自旋分裂情况非常有趣。自旋分裂量子线子带的杂化导致异常的自旋结构,其中电子的运动方向可以固定其自旋状态。这种特殊的性质对于量子线中的线性传输具有重要的影响,从而导致在没有磁场或铁磁接触的情况下产生自旋积累。基于Tomonaga-Luttinger模型的一般化,开发了用于交互作用的Rashba分裂量子线的描述。 (C)2004 Elsevier Ltd.保留所有权利。

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