| 复合磁垒纳米结构中的量子输运 |
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| 引用本文： | 卢卯旺,张立德.复合磁垒纳米结构中的量子输运[J].零陵学院学报,2002(6). |
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| 作者姓名： | 卢卯旺 张立德 |
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| 作者单位： | 中国科学院固体物理研究所，中国科学院固体物理研究所 合肥1129信箱，230031零陵学院物理系，湖南永州，425000，合肥1129信箱，230031 |
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| 基金项目： | 国家自然科学基金(批准号10074064) |
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| 摘 要： | 提出了复合磁垒的概念并研究了复合磁垒纳米结构中电子的隧穿输运性质.对照相应的非复合磁垒结构, 这种磁纳米结构大大增强了电子的波矢滤波特性.当考虑电子的自旋与非均匀磁场的相互作用,这种磁垒纳米结构具有很强的电子自旋极化效应.
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| 关 键 词： | 复合磁垒纳米结构 隧穿输运 自旋极化 |
Quantum transport in composite magnetic-barrier nanostructures |
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| Authors: | Mao-Wang Lu and Li-De Zhang Institute of Solid State Physics Chinese Academy of Sciences PO Box Hefei |
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| Institution: | Mao-Wang Lu 1,2 and Li-De Zhang 1 1Institute of Solid State Physics,Chinese Academy of Sciences,P.O. Box 1129,Hefei 230031 2Department of Physics,Lingling College,Yongzhou 425000,Huna |
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| Abstract: | We propose the composite magnetic-barrier nanostructure consisting of two different kinds of magnetic barriers, which can be realized experimentally by alternately changing the distance between stripes and 2DEG. The transport properties for electrons tunneling through this type of magnetic nanostructure are investigated theoretically. It is shown that the composite magnetic barriers greatly enhance the wave-vector-filtering in contrast to that in corresponding non-composite magnetic barriers. It is also shown that the composite magnetic-barrier nanostructure shows up an evident electron-spin polarization effects. |
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| Keywords: | composite magnetic-barrier nanostructure resonantly tunneling spin polarization Pacc: 7440 0365 |
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