Coulomb-modified Fano interference in a double quantum dot Aharonov-Bohm ring

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	Coulomb-modified Fano interference in a double quantum dot Aharonov-Bohm ring
	W. J. Gong; Y. Han; X. F. Xie; G. Z. Wei
	2010
发表期刊	Physica Status Solidi B-Basic Solid State Physics
ISSN	0370-1972
卷号	247 期号:9 页码:2222-2230
摘要	By truncating the equation of motion of Green function within the second-order approximation, the Coulomb-induced changes of Fano interference in electronic transport through a double quantum dot (QD) Aharonov-Bohm (AB) ring are investigated. It shows that the Coulomb interaction in the reference-channel QD can remarkably modify the Fano interference. When studying the conductance vs the resonant-channel QD, we find that the presented Coulomb interaction in the reference-channel QD leads to the increase or decrease of the asymmetry of the Fano lineshape, as well as the inversion of the Fano lineshape, dependent on the appropriate Coulomb strength. In the case of the adjustable levels of both the QDs, the Coulomb-induced splitting of the nonresonant channel induces the destruction of the Fano interference; whereas two weak Fano lineshapes may appear in the conductance spectra when the many-body effect in the QD of the resonant channel is also considered. Interestingly, in the absence of magnetic field, when the different-strength electron interactions make the different-channel QD levels the same as each other, which state is resonant will keep empty regardless the adjustment of QD levels. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
部门归属	[gong, weijiang; xie, xuefeng; wei, guozhu] northeastern univ, coll sci, shenyang 110004, peoples r china. [han, yu] liaoning univ, dept phys, shenyang 110036, peoples r china. [gong, weijiang; wei, guozhu] chinese acad sci, int ctr mat phys, shenyang 110016, peoples r china.;gong, wj (reprint author), northeastern univ, coll sci, shenyang 110004, peoples r china;weijianggong@gmail.com
关键词	Collective Excitations Electronic Transport Quantum Dots Electronic Transport Kondo Resonance
URL	查看原文
WOS记录号	WOS:000282741400014
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31120
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. J. Gong,Y. Han,X. F. Xie,et al. Coulomb-modified Fano interference in a double quantum dot Aharonov-Bohm ring[J]. Physica Status Solidi B-Basic Solid State Physics,2010,247(9):2222-2230.
APA	W. J. Gong,Y. Han,X. F. Xie,&G. Z. Wei.(2010).Coulomb-modified Fano interference in a double quantum dot Aharonov-Bohm ring.Physica Status Solidi B-Basic Solid State Physics,247(9),2222-2230.
MLA	W. J. Gong,et al."Coulomb-modified Fano interference in a double quantum dot Aharonov-Bohm ring".Physica Status Solidi B-Basic Solid State Physics 247.9(2010):2222-2230.