Two level mixing effects probed by resonant tunnelling through vertically coupled quantum dots

被引：6

作者：

Amaha, S. ^{[1
]}

Payette, C. ^{[2
,3
]}

Gupta, J. A. ^{[2
]}

Hatano, T. ^{[1
]}

Ono, K. ^{[4
]}

Kodera, T. ^{[5
]}

Tokura, Y. ^{[1
,6
]}

Austing, D. G. ^{[2
,3
]}

Tarucha, S. ^{[1
,7
]}

机构：

[1] JST, ICORP, Quantum Informat Project, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan

[2] CNR, Inst Microstruct Sci M50, Ottawa KIA 0R6, ON, Canada

[3] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

[4] RIKEN, Wako, Saitama 3510198, Japan

[5] Collaborative Inst Nano Quantum Informat, Meguro Ku, Tokyo 1538505, Japan

[6] NTT Basic Res Lab, Atsugi, Kanagawa 2430198, Japan

[7] Univ Tokyo, Dept Appl Phys, Sch Engn, Bunkyo Ku, Tokyo 1338656, Japan

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 5, NO 1 | 2008年 / 5卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1002/pssc.200776573

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We study the magnetic (B-) field evolution of single-particle levels in one dot by observing resonant tunnelling (RT) between two weakly coupled vertical quantum dots in series. The B-field dependence of the RT current peaks in the spectrum follows closely that of the states of a circular two dimensional harmonic potential. Several prominent two-level anti-crossing features are revealed. The RT current changes dramatically on passing through the anti-crossing point. This can be assigned to the nature of inter-dot RT though intra-dot level-mixed states. [GRAPHICS] (a) Schematic diagram of our device. (b) Measured anti-cross in the resonant current induced by intra-dot two level mixing. (c) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：174 / +

页数：2

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