| 旁耦合于介观环与铁磁电极量子点系统中的自旋极化输运 |
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| 引用本文： | 黄睿,吴绍全,闫从华.旁耦合于介观环与铁磁电极量子点系统中的自旋极化输运[J].计算物理,2011,28(1):131-137. |
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| 作者姓名： | 黄睿 吴绍全 闫从华 |
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| 作者单位： | 1. 西南石油大学理学院, 四川 成都 610500;2. 四川师范大学物理与电子工程学院, 四川 成都 610068 |
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| 基金项目： | 西南石油大学校级科技基金(青年基金)(2010XJZ187)资助项目 |
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| 摘 要： | 借助单杂质Anderson模型哈密顿量,及利用格林函数和运动方程等理论,研究旁耦合于介观环和铁磁电极的量子点系统中的极化输运特性.结果表明,通过调节点-环耦合强度、铁磁电极中的极化强度、磁矩相对取向及温度等,均能实现控制体系中自旋极化电流的目的,达到自旋阀效应.为此系统作为一种新的自旋电子材料提供理论依据.
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| 关 键 词： | Kondo效应 自旋极化输运 态密度 |
| 收稿时间： | 2009-11-19 |
| 修稿时间： | 2010-05-28 |
Spin-polarized Transport Through a Quantum Dot Side-coupled to Ferromagnetic Leads and a Mesoscopic Ring |
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| HUANG Rui,WU Shaoquan,YAN Conghua.Spin-polarized Transport Through a Quantum Dot Side-coupled to Ferromagnetic Leads and a Mesoscopic Ring[J].Chinese Journal of Computational Physics,2011,28(1):131-137. |
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| Authors: | HUANG Rui WU Shaoquan YAN Conghua |
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| Affiliation: | 1. College of Sciences, Southwest Petroleum University, Chengdu 610500, China;2. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610068, China |
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| Abstract: | In a single impurity Anderson model,with equation of motion and Green function,we study spin polarized transport through a quantum dot side-coupled to ferromagnetic leads and a mesoscopic ring.It shows that the coupling strength between quantum dot and mesoscopic ring,spin polarization,relative angle of magnetic moment in ferromagnetic leads and temperature are all important parameters for electron transport in the quantum dot system.It can be used to generate a spin-valve effect.It provides theories for a ... |
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| Keywords: | Kondo effect spin-polarized transport density of states |
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