| 纳米环中基于自旋轨道耦合的自旋过滤效应 |
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| 引用本文： | 方明,白絮芳.纳米环中基于自旋轨道耦合的自旋过滤效应[J].固体电子学研究与进展,2009,29(4). |
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| 作者姓名： | 方明 白絮芳 |
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| 作者单位： | 1. 渤海大学物理系,辽宁,锦州,121013
2. 内蒙古民族大学光电学院,内蒙古,通辽,028043 |
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| 基金项目： | 教育部光电技术及系统重点实验室资助课题 |
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| 摘 要： | 理论研究纳米尺度半导体量子环中的电子自旋极化输运现象。量子环的每个臂上生长一个半导体量子点,其中存在Rashba自旋轨道耦合相互作用。在外加磁通的联合作用下,流过体系的自旋朝上和朝下的电子将获得不同的相位,从而发生不同的干涉效应。在适当调控体系参数的情况下,只能有一种自旋取向的电子通过,即发生了自旋过滤效应。此结构能在现有的实验条件下实现,并有望能得到实际的应用。
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| 关 键 词： | 纳米环 Rashba自旋轨道耦合作用 自旋过滤 |
Spin-filtering Effect Based on the Spin-orbit Interaction in a Nano-ring Device |
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| FANG Ming,BAI Xufang.Spin-filtering Effect Based on the Spin-orbit Interaction in a Nano-ring Device[J].Research & Progress of Solid State Electronics,2009,29(4). |
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| Authors: | FANG Ming BAI Xufang |
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| Affiliation: | FANG Ming1 BAI Xufang2(1Department of Physics,Bohai University,Jinzhou,Liaoning,121013,CHN)(2College of Physics and Electronmechanics,Inner Mongolia University for Nationalities,Tongliao,Inner Mongolia,028043,CHN) |
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| Abstract: | The spin-polarized transport in a nanoscale semiconductor ring device is theoretically investigated.There is a quantum dot in each of the arms of the ring where Rashba spin-orbit interaction exists.By the co-action of this interaction and the external applied magnetic flux,spin-up and spin-down electrons will acquire different phase factors and thus different interference effects take place.By properly adjusting the parameters relevant to the structures,only one spin direction electrons can pass through it,... |
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| Keywords: | nano-ring Rashba spin-orbit interaction spin-filtering |
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