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arXiv 0810.3386cond-mat.mes-hall
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自旋轨道相互作用下的自旋积累

Spin accumulation with spin-orbit interaction

Henri Saarikoski, Gerrit E. W. Bauer

摘要:

自旋累积是自旋电子学中一个重要但不精确的概念。在基于金属的自旋电子学中,它以半经典分布函数来表征。在具有强自旋轨道耦合的半导体中,自旋积累被解释为相干本征态的叠加。这两种观点都可以通过考虑电子-电子相互作用来调和:足够强的自洽交换场将自旋累积减少为两个自旋带之间的化学电势差,即使在存在自旋-轨道耦合的情况下。我们展示了一个干净的二维电子气(2DEG)的想法,通过显示交换场如何保护从退相的自旋积累,并介绍了易平面各向异性。

英文摘要:

Spin accumulation is a crucial but imprecise concept in spintronics. In metal-based spintronics it is characterized in terms of semiclassical distribution functions. In semiconductors with a strong spin-orbit coupling the spin accumulation is interpreted as a superposition of coherent eigenstates. Both views can be reconciled by taking into account the electron-electron interaction: a sufficiently strong self-consistent exchange field reduces a spin accumulation to a chemical potential difference between the two spin bands even in the presence of spin-orbit coupling. We demonstrate the idea on a clean two-dimensional electron gas (2DEG) by showing how the exchange field protects a spin accumulation from dephasing and introduces an easy-plane anisotropy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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