Pauli Spin Blockade and Influence of Hyperfine Interaction in Vertical Quantum Dot Molecule with Six-Electrons

被引：6

作者：

Amaha, Shinichi ^{[1
,3
]}

Kodera, Tetsuo ^{[2
]}

Hatano, Tsuyoshi ^{[1
,3
]}

Ono, Keiji ^{[3
]}

Tokura, Yasuhiro ^{[4
]}

Tarucha, Seigo ^{[5
]}

Gupta, James A. ^{[6
]}

Austing, David Guy ^{[6
]}

机构：

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

[2] Univ Tokyo, Inst Nano Quantum Informat Elect, Meguro Ku, Tokyo 1538505, Japan

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

[4] NTT Corp, NTT Basic Res Labs, Kanagawa 2430198, Japan

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

[6] CNR, Inst Microstruct Sci M50, Ottawa, ON K1A 0R6, Canada

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2011年 / 80卷 / 02期

基金：

日本学术振兴会;

关键词：

coupled quantum dots; Pauli spin blockade; hyperfine interaction;

D O I：

10.1143/JPSJ.80.023701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate Pauli spin blockade and the influence of hyperfine interaction for a system of six-electrons in a device composed of two weakly coupled vertical quantum dots. As a consequence of a large built-in offset energy between the dots, the relevant charge configurations consist of one (zero) and five (six) electrons on the upstream dot and downstream dot respectively. On sweeping the out-of-dot-plane magnetic field up and down, abrupt steps and hysteresis in the leakage current are observed in the Pauli spin blockade region that evolve systematically with bias. We propose a model to explain our observations in terms of hyperfine induced singlet-triplet mixing.

引用

页数：4

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