| 通过自旋进动量子点的自旋相关的隧穿 |
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| 引用本文： | 张爱芳,辛子华,宋红岩,吴留坡,施耀铭.通过自旋进动量子点的自旋相关的隧穿[J].上海大学学报(英文版),2008,12(1):39-42. |
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| 作者姓名： | 张爱芳 辛子华 宋红岩 吴留坡 施耀铭 |
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| 作者单位： | Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, P. R. China |
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| 摘 要： | Spin-polarized transport through a precessing magnetic spin coupled to ferromagnetic electrodes is studied using a non-equilibrium Green＇s function approach. The characteristic of conductance is obtained at zero temperature. We find that competition between spin-exchange interaction on the spin site and spin-orbit interaction in the barriers dominates the resonant behavior of conductance. In a parallel configuration, conductance peaks have identical amplitude. With the angle θ increasing, the width of resonant peaks is broadened or narrowed for different spin coherent states. In an anti-parallel case, spin-flip tunneling in the barriers will essentially enhance amplitude of the conductance peak.
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| 关 键 词： | 自旋进动 量子点 自旋方式 隧穿 |
| 文章编号： | 10.1007/s11741-008-0108-2 |
| 收稿时间： | 2006-03-24 |
| 修稿时间： | 2006-05-24 |
Spin-dependent tunneling through a spin precession quantum dot |
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| Ai-fang Zhang,Zi-hua Xin,Hong-yan Song,Liu-po Wu,Yao-ming Shi.Spin-dependent tunneling through a spin precession quantum dot[J].Journal of Shanghai University(English Edition),2008,12(1):39-42. |
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| Authors: | Ai-fang Zhang Zi-hua Xin Hong-yan Song Liu-po Wu Yao-ming Shi |
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| Institution: | Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, P. R. China |
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| Abstract: | Spin-polarized transport through a processing magnetic spin coupled to ferromagnetic electrodes is studied usinga non-equilibrium Green's function approach. The characteristic of conductance is obtained at zero temperature. We findthat competition between spin-exchange interaction on the spin site and spin-orbit interaction in the barriers dominates theresonant behavior of conductance. In a parallel configuration, conductance peaks have identical amplitude. With the angle θincreasing, the width of resonant peaks is broadened or narrowed for different spin coherent states. In an anti-parallel case,spin-flip tunneling in the barriers will essentially enhance amplitude of the conductance peak. |
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| Keywords: | spin-dependent transport precessing spin ferromagnetic electrodes |
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