| 磁调制量子结构的自旋过滤特性 |
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| 引用本文： | 张桂莲,卢卯旺,唐孝武.磁调制量子结构的自旋过滤特性[J].湖南科技学院学报,2009,30(4). |
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| 作者姓名： | 张桂莲 卢卯旺 唐孝武 |
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| 作者单位： | 1. 湖南科技学院,电子工程与物理系,湖南,永州,425100
2. 永州市四中,湖南,永州,425100 |
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| 摘 要： | 基于杂化磁调制量子结构,我们从理论上提出了一电子自旋过滤器,并研究了其自旋输运性质.实验上,其可以通过在半导体异质结表面沉积磁化方向不同的铁磁条带形成.通过对真实InAs 材料系统的计算,发现这种系统具有很强的电子自旋极化效应,其自旋极化度在共振时几乎达到100%.因此,该结构可以用于电子自旋过滤器.
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| 关 键 词： | 磁调制量子结构 自旋极化 自旋过滤 |
Spin Filtering in Magnetically Modulated Quantum Structures |
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| ZHANG Gui-Lian,LU Mao-Wang,TANG Xiao-wu.Spin Filtering in Magnetically Modulated Quantum Structures[J].Journal of Hunan University of Science and Engineering,2009,30(4). |
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| Authors: | ZHANG Gui-Lian LU Mao-Wang TANG Xiao-wu |
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| Institution: | 1.Department of Electronic Engineering and Physics;Hunan University of Science and Engineering;Yongzhou Hunan 425100;China 2.The fourth school of Yongzhou;China |
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| Abstract: | We present a spin filtering device and study on the electron spin transport in a magnetically modulated quantum structure, which can be realized by depositing two ferromagnetic stripes with different magnetization on the top of a semiconductor heterostructure. By numerical calculations for the realistic InAs material, it is show that this kind of system possesses a considerable spin polarization effect, and its degree can reach 100% at resonance. Thus, our considered systems can be used as spin filters. |
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| Keywords: | Magnetically modulated quantum structures Spin polarization Spin filtering |
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