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双层纳米线中量子点接触的子带间自旋轨道耦合产生的自旋过滤效应。

Spin filtering effect generated by the inter-subband spin-orbit coupling in the bilayer nanowire with the quantum point contact.

机构信息

AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. Mickiewicza 30, Kraków, Poland.

出版信息

Sci Rep. 2017 Mar 30;7:45346. doi: 10.1038/srep45346.

DOI:10.1038/srep45346
PMID:28358141
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5371906/
Abstract

The spin filtering effect in the bilayer nanowire with quantum point contact is investigated theoretically. We demonstrate the new mechanism of the spin filtering based on the lateral inter-subband spin-orbit coupling, which for the bilayer nanowires has been reported to be strong. The proposed spin filtering effect is explained as the joint effect of the Landau-Zener intersubband transitions caused by the hybridization of states with opposite spin (due to the lateral Rashba SO interaction) and the confinement of carriers in the quantum point contact region.

摘要

本文从理论上研究了具有量子点接触的双层纳米线中的自旋过滤效应。我们基于横向子带间自旋轨道耦合展示了基于自旋过滤的新机制，据报道，这种耦合在双层纳米线中很强。所提出的自旋过滤效应解释为由于横向 Rashba SO 相互作用导致自旋相反的状态（由于横向 Rashba SO 相互作用）杂化以及在量子点接触区域中载流子的限制而引起的朗道-泽纳子带间跃迁的联合效应。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/4b2fd99e61c7/srep45346-f11.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/ddb0358d0367/srep45346-f1.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/6eebb2460148/srep45346-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/7b678721dabd/srep45346-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/8dafa56abd28/srep45346-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/9b88451af732/srep45346-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5bb3/5371906/4b2fd99e61c7/srep45346-f11.jpg

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