| 量子环终端布局对自旋输运的影响 |
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| 引用本文： | 杜坚. 量子环终端布局对自旋输运的影响[J]. 固体电子学研究与进展, 2010, 30(2) |
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| 作者姓名： | 杜坚 |
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| 作者单位： | 承德民族师范高等专科学校物理系,河北,承德,067000 |
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| 基金项目： | 河北省教育厅自然科学研究指导项目 |
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| 摘 要： | 研究了量子环透射终端与入射终端相对位置改变时的变化规律。研究结果表明:透射概率和自旋极化率随半导体环尺寸的增大作周期性振荡,都与透射终端位置的改变相关;铁磁电极、Rashba自旋轨道耦合、外加磁场对透射概率和自旋极化率具有不同影响;透射概率随δ势垒强度增加单调减小,自旋极化率随δ势垒强度增加单调增大。
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| 关 键 词： | 量子环 Rashba自旋轨道耦合 AB磁通 透射概率 自旋极化率 δ势垒 |
The Effect of Distribution of Quantum Rings Terminals on Spin Transportation |
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| DU Jian. The Effect of Distribution of Quantum Rings Terminals on Spin Transportation[J]. Research & Progress of Solid State Electronics, 2010, 30(2) |
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| Authors: | DU Jian |
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| Abstract: | We report the transmission coefficient for different positions of transmission and incidence terminals.The investigated results show that both transmission coefficient and spin-polarized efficiency were periodic oscillations with increasing semiconductor ring sizes,which depended on the changes of transmission terminals positions.The different effects of the ferromagnetic electrode,Rashba spin-orbit coupling and applied magnetic field on spin-polarized efficiency and transmission coefficient were also considered.The tunneling coefficient decreases monotonically with the δ barrier strength,while spin-polarized efficiency increased with the δ barrier strength. |
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| Keywords: | quantum ring Rashba spin-orbit coupling AB flux transmission coefficient spin-polarized efficiency δ barrier |
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