Charge states of a collinearly and laterally coupled vertical triple quantum dot device

被引：4

作者：

Amaha, Shinichi ^{[1
]}

Hatano, Tsuyoshi ^{[1
]}

Tamura, Hiroyuki ^{[2
]}

Kubo, Toshihiro ^{[1
]}

Teraoka, Soichiro ^{[1
]}

Tokura, Yasuhiro ^{[1
,2
]}

Austing, David Guy ^{[3
]}

Tarucha, Seigo ^{[1
,4
,5
]}

机构：

[1] ICORP JST, Quantum Spin Informat Project, Atsugi, Kanagawa 2430198, Japan

[2] NTT Corp, NTT Basic Res Labs, Atsugi, Kanagawa 2430198, Japan

[3] Natl Res Council Canada, Inst Microstruct Sci M50, Ottawa, ON K1A 0R6, Canada

[4] Univ Tokyo, Sch Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

[5] Univ Tokyo, Inst Nano Quantum Informat Elect, Meguro Ku, Tokyo 1538508, Japan

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 42卷 / 04期

关键词：

Quantum dots; Quantum dot molecules; Triple quantum dots; Stability diagram; ELECTRON-TRANSPORT; SPIN;

D O I：

10.1016/j.physe.2009.11.023

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Three laterally laterally coupled vertical single quantum dots (tQDs) in a collinear arrangement, with common source and drain electrodes, are investigated. The tQDs are formed inside three connected pillars (mesal, mesa2, mesa3) with four side gate electrodes (Cl, G2 (G2'), G3). Three families of Coulomb oscillation lines corresponding to charges in the numbers of electrons in the three dots are observed, and the few-electron charge configurations can be assigned. We also discuss the separation of adjacent Coulomb peak lines in the stability diagram, indicating that the inter-dot Coulomb energy between adjacent dots (mesa1-mesa2 and mesa2-mesa3) is significantly larger than that between the two non-adjacent dots (mesa1-mesa3). (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：899 / 901

页数：3

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