Two- and Three-Electron Pauli Spin Blockade in Series-Coupled Triple Quantum Dots

被引：44

作者：

Amaha, S. ^{[1
,2
]}

Izumida, W. ^{[3
]}

Hatano, T. ^{[2
,4
]}

Teraoka, S. ^{[2
,5
]}

Tarucha, S. ^{[1
,2
,5
]}

Gupta, J. A. ^{[6
]}

Austing, D. G. ^{[6
]}

机构：

[1] RIKEN, Adv Sci Inst, Wako, Saitama 3510198, Japan

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

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

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

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

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

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 01期

基金：

日本学术振兴会;

关键词：

Electrons;

D O I：

10.1103/PhysRevLett.110.016803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate two- and three-electron spin blockade in three vertical quantum dots (QDs) coupled in series. Two-electron spin blockade is found in a region where sequential tunneling through all QDs is forbidden but tunneling involving virtual hopping through an empty QD is allowed. It is observed only for the hole cycle with a distinct bias threshold for access to the triplet state. Three-electron spin blockade involving the quadruplet state is observed for nonequibilium conditions where sequential tunneling is allowed and the triplet state is accessible. Our results shine light on the importance of the nonequibilium conditions to obtain sufficient population of triplet and quadruplet states necessary for spin blockade. DOI: 10.1103/PhysRevLett.110.016803

引用

页数：5

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