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	Quantum interference effect in electron tunneling through a quantum-dot-ring spin valve
	Ma,Jing-Min; Zhao,Jia; Zhang,Kai-Cheng; Peng,Ya-Jing; Chi,Feng
刊名	Nanoscale research letters
	2011-03-28
卷号	6期号:1
ISSN号	1556-276X
DOI	10.1186/1556-276x-6-265
通讯作者	Chi,feng(chifeng@semi.ac.cn)
英文摘要	Abstractspin-dependent transport through a quantum-dot (qd) ring coupled to ferromagnetic leads with noncollinear magnetizations is studied theoretically. tunneling current, current spin polarization and tunnel magnetoresistance (tmr) as functions of the bias voltage and the direct coupling strength between the two leads are analyzed by the nonequilibrium green's function technique. it is shown that the magnitudes of these quantities are sensitive to the relative angle between the leads' magnetic moments and the quantum interference effect originated from the inter-lead coupling. we pay particular attention on the coulomb blockade regime and find the relative current magnitudes of different magnetization angles can be reversed by tuning the inter-lead coupling strength, resulting in sign change of the tmr. for large enough inter-lead coupling strength, the current spin polarizations for parallel and antiparallel magnetic configurations will approach to unit and zero, respectively.pacs numbers:
语种	英语
出版者	Springer New York
WOS记录号	BMC:10.1186/1556-276X-6-265
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2426169
专题	半导体研究所
通讯作者	Chi,Feng
作者单位	Bohai University; Department of Physics
推荐引用方式 GB/T 7714	Ma,Jing-Min,Zhao,Jia,Zhang,Kai-Cheng,et al. Quantum interference effect in electron tunneling through a quantum-dot-ring spin valve[J]. Nanoscale research letters,2011,6(1).
APA	Ma,Jing-Min,Zhao,Jia,Zhang,Kai-Cheng,Peng,Ya-Jing,&Chi,Feng.(2011).Quantum interference effect in electron tunneling through a quantum-dot-ring spin valve.Nanoscale research letters,6(1).
MLA	Ma,Jing-Min,et al."Quantum interference effect in electron tunneling through a quantum-dot-ring spin valve".Nanoscale research letters 6.1(2011).

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