| Detection of spin bias in a four-terminal quantum-dot ring |
| W. J. Gong; H. Li; Y. Han; G. Z. Wei
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| 2011
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| 发表期刊 | Physics Letters A
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| ISSN | 0375-9601
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| 卷号 | 375期号:10页码:1333-1338 |
| 摘要 | In this work, via introducing local Rashba spin-orbit interaction in a four-terminal quantum-dot (QD) ring, we show that the spin bias in the transverse terminals induces apparent charge currents in the longitudinal terminals, accompanied by the similar magnitude and opposite directions of them. The reason is that the Rashba interaction destroys the space-reversal symmetry of this structure and causes the spin dependence of the quantum interference. Then the opposite-spin currents driven by the spin bias present different magnitudes, which gives rise to the emergence of finite charge currents in the longitudinal terminals. Via these results, we suggest that the spin bias can be measured by observing the longitudinal charge currents, which provides an electrical but practical scheme to detect the spin bias (or spin current). (C) 2011 Elsevier B.V. All rights reserved. |
| 部门归属 | [gong, weijiang; li, hui; wei, guozhu] northwestern univ, coll sci, shenyang 110819, peoples r china. [gong, weijiang; wei, guozhu] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china. [han, yu] liaoning univ, dept phys, shenyang 110036, peoples r china.;gong, wj (reprint author), northwestern univ, coll sci, shenyang 110819, peoples r china;weijianggong@gmail.com
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| 关键词 | Quantum Dot
Spin Bias
Rashba Interaction
Charge Current
Spintronics
Transport
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| URL | 查看原文
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| WOS记录号 | WOS:000288145100011
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/30350
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
W. J. Gong,H. Li,Y. Han,et al. Detection of spin bias in a four-terminal quantum-dot ring[J]. Physics Letters A,2011,375(10):1333-1338.
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| APA |
W. J. Gong,H. Li,Y. Han,&G. Z. Wei.(2011).Detection of spin bias in a four-terminal quantum-dot ring.Physics Letters A,375(10),1333-1338.
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| MLA |
W. J. Gong,et al."Detection of spin bias in a four-terminal quantum-dot ring".Physics Letters A 375.10(2011):1333-1338.
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