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arXiv 1006.3566cond-mat.mtrl-sci
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Bi/Si(111)界面巨自旋轨道分裂的能带结构

A band structure scenario for the giant spin-orbit splitting observed at the Bi/Si(111) interface

Emmanouil Frantzeskakis, Stephane Pons, Marco Grioni

摘要:

Bi/Si(111)(sqrt{3} x sqrt{3})R30三聚体相提供了在与半导体衬底的界面处电子态的巨大自旋轨道分裂的主要实例。我们已经进行了详细的角度分辨光电子能谱(ARPES)的研究,以澄清复杂的拓扑结构的混合界面带。ARPES数据的分析,由模型紧束缚计算的指导下,揭示了一个以前未探索的机制,在起源的巨大的自旋轨道分裂,这主要依赖于底层的能带结构。我们预计,其他类似的界面特征的三聚体结构也可能表现出很大的影响。

英文摘要:

The Bi/Si(111) (sqrt{3} x sqrt{3})R30 trimer phase offers a prime example of a giant spin-orbit splitting of the electronic states at the interface with a semiconducting substrate. We have performed a detailed angle-resolved photoemission (ARPES) study to clarify the complex topology of the hybrid interface bands. The analysis of the ARPES data, guided by a model tight-binding calculation, reveals a previously unexplored mechanism at the origin of the giant spin-orbit splitting, which relies primarily on the underlying band structure. We anticipate that other similar interfaces characterized by trimer structures could also exhibit a large effect.

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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