Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device

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	Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device
	W. J. Gong; X. F. Xie; G. Z. Wei
	2010
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	107 期号:7
摘要	In this paper, the Coulomb-induced changes of electronic transport through a double quantum dot (QD) Aharonov-Bohm-Fano interferometer are discussed. For the linear-transport case, the variation of Coulomb interaction in the reference-channel QD can remarkably modify the sign of the Fano parameter, which leads to the change in Fano interference, including the increase or decrease in the symmetry of the Fano lineshape, as well as the inversion of the Fano lineshape. When both the QD levels are adjustable, the Coulomb-induced splitting of the reference channel induces the destruction of Fano interference; whereas two blurry Fano lineshapes may appear in the conductance spectra when the many-body effect in the resonant-channel QD is also considered. Interestingly, in the absence of magnetic field, when the different-strength electron interactions make one pair of QD levels of different channels the same, the corresponding resonant state becomes a vacuum state. As for the nonlinear electron transport, the Fano lineshapes emerge in the differential conductance spectra when the resonant-channel QD level is adjusted to the vicinity of the chemical potential of either lead, except for the case where it encounters the reference-channel QD level. The presented Coulomb interactions also play a nontrivial role in the appearance of the negative differential conductance. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3311641]
部门归属	[gong, weijiang; xie, xuefeng; wei, guozhu] northeastern univ, coll sci, shenyang 110004, peoples r china. [gong, weijiang; wei, guozhu] acad sinica, int ctr mat phys, shenyang 110015, peoples r china.;gong, wj (reprint author), northeastern univ, coll sci, shenyang 110004, peoples r china;weijianggong@gmail.com
关键词	Electronic Transport Kondo Resonance Systems
URL	查看原文
WOS记录号	WOS:000276795400041
引用统计	被引频次：10[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/321006/31121
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. J. Gong,X. F. Xie,G. Z. Wei. Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device[J]. Journal of Applied Physics,2010,107(7).
APA	W. J. Gong,X. F. Xie,&G. Z. Wei.(2010).Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device.Journal of Applied Physics,107(7).
MLA	W. J. Gong,et al."Coulomb-modified equilibrium and nonequilibrium properties in a double quantum dot Aharonov-Bohm-Fano interference device".Journal of Applied Physics 107.7(2010).