Series-Coupled Triple Quantum Dot Molecules

被引：3

作者：

Amaha, Shinichi ^{[1
,2
]}

Hatano, Tsuyoshi ^{[2
,3
]}

Izumida, Wataru ^{[4
]}

Teraoka, Soichiro ^{[2
,5
]}

Ono, Keiji ^{[1
]}

Kono, Kimitoshi ^{[1
]}

Tarucha, Seigo ^{[2
,5
]}

Aers, Geof ^{[6
]}

Gupta, James ^{[6
]}

Austing, Guy ^{[6
]}

机构：

[1] RIKEN, Low Temp Phys Lab, Wako, Saitama 3510198, Japan

[2] Japan Sci & Technol Agcy, ICORP, Quantum Spin Informat Project, Atsugi, Kanagawa 2430198, Japan

[3] Japan Sci & Technol Agcy, ERATO, Nucl Spin Elect Project, Sendai, Miyagi 9808578, Japan

[4] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

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

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

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 02期

基金：

日本学术振兴会;

关键词：

STATES; SPINS;

D O I：

10.1143/JJAP.51.02BJ06

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present the electronic properties of a triple quantum dot molecule embedded inside a sub-micron mesa, made from a quadruple-barrier triple-quantum-well structure, and surrounded by a single gate electrode. We outline the design principles of the quadruple-barrier triple-quantum-well structure and calculate the energy of the three lowest states as a function of center well thickness. We observe regular and irregular shaped Coulomb diamond regions similar to those for double quantum dot devices. Variation in the Coulomb blockade region shape is introduced by fluctuation in the offset energies between the quantum dots likely associated with device processing and random impurity potential in the material. We also present Coulomb blockade patterns calculated with a constant interaction model for sequential tunneling through the three series-coupled quantum dots. (C) 2012 The Japan Society of Applied Physics

引用

页数：4

共 27 条

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