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arXiv 1011.2676cond-mat.mes-hall
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由于立方Rashba自旋轨道耦合引起的空穴的反常自旋分辨点接触传输

Anomalous spin-resolved point-contact transmission of holes due to cubic Rashba spin-orbit coupling

Stefano Chesi, Gabriele F. Giuliani, L. P. Rokhinson, L. N. Pfeiffer, K. W. West

摘要:

证明了在具有强自旋轨道相互作用的二维空穴气体量子点接触中,两个最低的一维自旋分裂子带的有限波矢交叉。这种现象为在磁聚焦实验中观察到的由点接触过滤的自旋极化的异常符号提供了一个优雅的解释。反交叉是由平行于沟道的磁场或横向于沟道的不对称势引入的。控制自旋分裂的大小提供了一种新的机制,用于反转自旋极化的符号。

英文摘要:

Evidence is presented for the finite wave vector crossing of the two lowest one-dimensional spin-split subbands in quantum point contacts fabricated from two-dimensional hole gases with strong spin-orbit interaction. This phenomenon offers an elegant explanation for the anomalous sign of the spin polarization filtered by a point contact, as observed in magnetic focusing experiments. Anticrossing is introduced by a magnetic field parallel to the channel or an asymmetric potential transverse to it. Controlling the magnitude of the spin-splitting affords a novel mechanism for inverting the sign of the spin polarization.

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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