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| 利用参数电子泵产生自旋流 | |
| 引用本文： | 乔振华,王今金,卫亚东.利用参数电子泵产生自旋流[J].深圳大学学报(理工版),2005,22(4):288-291. |
| 作者姓名： | 乔振华 王今金 卫亚东 |
| 作者单位： | 1. 香港大学物理系,香港;山西大学物理电子工程学院,太原,030006 2. 伦敦大学帝国理工学院,英国 3. 深圳大学理学院,深圳,518060 |
| 基金项目： | 国家自然科学基金资助项目(10274052) |
| 摘 要： | 利用散射矩阵理论,研究在绝热近似下受磁势和电势共同调制的正常导线量子点正常导线组成的量子系统泵浦效应,讨论电子的泵浦电流和泵浦自旋流随费米能和泵浦强度等系统参量的变化.计算表明,利用该量子泵浦系统可以在电流很小的情况下,得到较大的自旋流.证明磁场和电场共同调制下的量子泵浦,是一种产生自旋流的可行方法. |
| 关 键 词： | 自旋流 参数泵浦 散射矩阵理论 |
| 文章编号： | 1000-2618(2005)04-0288-04 |
| 收稿时间： | 2005-07-28 |
| 修稿时间： | 2005年7月28日 |
Spin current by parametric electron pump |
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| QIAO Zhen-hua,WANG Jin-jin,WEI Ya-dong.Spin current by parametric electron pump[J].Journal of Shenzhen University(Science &engineering),2005,22(4):288-291. | |
| Authors: | QIAO Zhen-hua WANG Jin-jin WEI Ya-dong |
| Affiliation: | 1. Department of Physics The University of Hong Kong Hong Kong P. R. China;2. College of Physical Electronic Engineering Shanxi University Taiyuan 030006 P. R. China;3.Blackett Laboratory Imperial College London The University of London UK;4. College of Science Shenzhen University Shenzhen 518060 P. R. China |
| Abstract: | Adiabatic parametric quantum pump of N-Qdot-N system was investigated. One pump signal was added by magnetic field and another was given by electric field. The pumped electric current and pumped spin current versus Fermi energy and signal amplitude were discussed. It is found that large spin current is obtained while the charge current is small enough. It is available and efficient to produce spin current by parametric pumping adjusted by electric and magnetic signals together. |
| Keywords: | spin current parametric pump scattering matrix theory |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |