Spin and charge currents through a quantum dot connected to ferromagnetic leads
文献类型：期刊论文
| 作者 | Chi, F; Li, SS |
| 刊名 | Chinese physics letters
 |
| 出版日期 | 2005-08-01 |
| 卷号 | 22期号:8页码:2035-2038 |
| ISSN号 | 0256-307X |
| 通讯作者 | Chi, f(chifeng@red.semi.ac.cn) |
| 英文摘要 | We investigate the spin polarized current through a quantum dot connected to ferromagnetic leads in the presence of a finite spin-dependent chemical potential. the effects of the spin polarization of the leads p and the external magnetic field b are studied. it is found that both the magnitude and the symmetry of the current are dependent on the spin polarization of the leads. when the two ferromagnetic leads are in parallel configuration, the spin polarization p has an insignificant effect on the spin current, and an accompanying charge current appears with the increase of p. when the leads are in antiparallel configuration, however, the effect of p is distinct. the charge current is always zero regardless of the variation of p in the absence of b. the peaks appearing in the pure spin current are greatly suppressed and become asymmetric as p is increased. the applied magnetic field b results in an accompanying charge current in both the parallel and antiparallel configurations of the leads. the characteristics of the currents are explained in terms of the density of states of the quantum dot. |
| WOS关键词 | TUNNEL-JUNCTIONS ; DEPENDENT TRANSPORT ; COHERENT TRANSPORT ; COULOMB-BLOCKADE ; MAGNETORESISTANCE ; OSCILLATIONS ; BARRIER ; DEVICE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000231049100059 |
| 出版者 | IOP PUBLISHING LTD |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2426516 |
| 专题 | 半导体研究所 |
| 通讯作者 | Chi, F |
| 作者单位 | Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chi, F,Li, SS. Spin and charge currents through a quantum dot connected to ferromagnetic leads[J]. Chinese physics letters,2005,22(8):2035-2038. |
| APA | Chi, F,&Li, SS.(2005).Spin and charge currents through a quantum dot connected to ferromagnetic leads.Chinese physics letters,22(8),2035-2038. |
| MLA | Chi, F,et al."Spin and charge currents through a quantum dot connected to ferromagnetic leads".Chinese physics letters 22.8(2005):2035-2038. |
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来源：半导体研究所
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