Intermediate low spin states in a few-electron quantum dot in the ν ≤ 1 regime

被引：31

作者：

Nishi, Y. ^{[1
]}

Maksym, P. A.

Austing, D. G.

Hatano, T.

Kouwenhoven, L. P.

Aoki, H.

Tarucha, S.

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[2] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[3] Natl Res Council Canada, Inst Microstruct Sci M23A, Ottawa, ON K1A 0R6, Canada

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

[5] Delft Univ Technol, Dept Appl Phys, NL-2600 GA Delft, Netherlands

[6] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW B | 2006年 / 74卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.74.033306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the effects of electron-electron interactions in a circular few-electron vertical quantum dot in such a strong magnetic field that the filling factor nu <= 1. We measure excitation spectra and find ground state transitions beyond the maximum density droplet (nu=1) region. We compare the observed spectra with those calculated by exact diagonalization to identify the ground state quantum numbers, and find that intermediate low-spin states occur between adjacent spin-polarized magic number states.

引用

页数：4

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