Decoupling and antiresonance in electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer

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	Decoupling and antiresonance in electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer
	Y. Han; W. J. Gong; H. N. Wu; G. Z. Wei
	2009
发表期刊	Physica B-Condensed Matter
ISSN	0921-4526
卷号	404 期号:14-15 页码:2001-2007
摘要	Electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer is theoretically investigated. In such a system, we find that when the quantum dot chain is symmetrically placed some of its molecular states decouple from the leads. Namely, in the absence of magnetic flux all odd molecular states decouple from the leads, but all even molecular states decouple from the leads when an appropriate magnetic flux is introduced. Interestingly, the antiresonance position in the electron transport spectrum is independent of the change of the decoupled molecular states. When incorporating the many-body effect by only considering the Hubbard term and truncating the motion equation of the Green functions to the second-order, we show that the emergence of decoupling gives rise to the apparent destruction of electron-hole symmetry. By adjusting the magnetic flux through either subring, some molecular states decouple from one lead but still couple to the other, and then some new antiresonances occur. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
部门归属	[han, yu; gong, weijiang; wu, haina; wei, guozhu] northeastern univ, coll sci, shenyang 110004, peoples r china. [han, yu] liaoning univ, dept phys, shenyang 110036, peoples r china. [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	Quantum Dot Decoupling Antiresonance Transistor Logic
URL	查看原文
WOS记录号	WOS:000267408000028
引用统计	被引频次：8[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/321006/31949
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Han,W. J. Gong,H. N. Wu,et al. Decoupling and antiresonance in electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer[J]. Physica B-Condensed Matter,2009,404(14-15):2001-2007.
APA	Y. Han,W. J. Gong,H. N. Wu,&G. Z. Wei.(2009).Decoupling and antiresonance in electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer.Physica B-Condensed Matter,404(14-15),2001-2007.
MLA	Y. Han,et al."Decoupling and antiresonance in electronic transport through a quantum dot chain embodied in an Aharonov-Bohm interferometer".Physica B-Condensed Matter 404.14-15(2009):2001-2007.