Transient and stationary transport properties of a three-subring quantum-dot structure

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	Transient and stationary transport properties of a three-subring quantum-dot structure
	Jiang, Z. T.1; Yang, J.1; Wang, Y.1; Wei, X. F.1; Han, Q. Z.2
刊名	JOURNAL OF PHYSICS-CONDENSED MATTER
	2008-11-05
卷号	20 期号:44
关键词	rate-equations interference
ISSN号	0953-8984
其他题名	J. Phys.-Condes. Matter
中文摘要	A systematical investigation into the transient and stationary transport properties of a circularly coupled triple quantum-dot system including three subrings has been carried out using the modified rate equations. It is shown that both the electron-occupation probabilities and the current flowing through the triple quantum-dot structure exhibit transient oscillations in the initial stage of the quantum dynamics and eventually evolve into stationary values. Furthermore, the influences on the stationary current caused by the magnetic field and the interdot Coulomb interaction are taken into account. It is demonstrated that with a variation of the magnetic flux the current shows the 2(1 + n(1) + n(2))pi-period Aharonov-Bohm oscillation with 1:n(1):n(2) being the ratio of the magnetic fluxes penetrating three subrings phi, n(1)phi, and n(2)phi. Moreover, although the interdot Coulomb interactions have an obvious effect upon specific oscillation behaviors, they are not able to change the oscillation period. Lastly, together with the results of the one-ring and two-subring structures, we extend the three-subring result into an N-subring case. It is verified that the Aharonov-Bohm oscillation period of the stationary current is 2(1 + n(1) + center dot center dot center dot + n(N-1))pi when the ratio of the reduced magnetic flux threading into the N subrings is 1:n(1): center dot center dot center dot :n(N-1).
英文摘要	A systematical investigation into the transient and stationary transport properties of a circularly coupled triple quantum-dot system including three subrings has been carried out using the modified rate equations. It is shown that both the electron-occupation probabilities and the current flowing through the triple quantum-dot structure exhibit transient oscillations in the initial stage of the quantum dynamics and eventually evolve into stationary values. Furthermore, the influences on the stationary current caused by the magnetic field and the interdot Coulomb interaction are taken into account. It is demonstrated that with a variation of the magnetic flux the current shows the 2(1 + n(1) + n(2))pi-period Aharonov-Bohm oscillation with 1:n(1):n(2) being the ratio of the magnetic fluxes penetrating three subrings phi, n(1)phi, and n(2)phi. Moreover, although the interdot Coulomb interactions have an obvious effect upon specific oscillation behaviors, they are not able to change the oscillation period. Lastly, together with the results of the one-ring and two-subring structures, we extend the three-subring result into an N-subring case. It is verified that the Aharonov-Bohm oscillation period of the stationary current is 2(1 + n(1) + center dot center dot center dot + n(N-1))pi when the ratio of the reduced magnetic flux threading into the N subrings is 1:n(1): center dot center dot center dot :n(N-1).
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Physics, Condensed Matter
研究领域[WOS]	Physics
关键词[WOS]	RATE-EQUATIONS ; INTERFERENCE
收录类别	SCI
原文出处	://WOS:000260028500024
语种	英语
WOS记录号	WOS:000260028500024
公开日期	2013-10-08
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/2781]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Beijing Inst Technol, Dept Phys, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Multiphase React Lab, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Z. T.,Yang, J.,Wang, Y.,et al. Transient and stationary transport properties of a three-subring quantum-dot structure[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2008,20(44).
APA	Jiang, Z. T.,Yang, J.,Wang, Y.,Wei, X. F.,&Han, Q. Z..(2008).Transient and stationary transport properties of a three-subring quantum-dot structure.JOURNAL OF PHYSICS-CONDENSED MATTER,20(44).
MLA	Jiang, Z. T.,et al."Transient and stationary transport properties of a three-subring quantum-dot structure".JOURNAL OF PHYSICS-CONDENSED MATTER 20.44(2008).