Excitons in quantum-ring structures in a magnetic field: optical properties and persistent currents

被引：27

作者：

Govorova, AO ^{[1
]}

Kalameitsev, AV

Warburton, R

Karrai, K

Ulloa, SE

机构：

[1] Ohio Univ, Dept Phys & Astron, Athens, OH 45701 USA

[2] Ohio Univ, CMSS Program, Athens, OH 45701 USA

[3] Russian Acad Sci, Inst Semicond Phys, Siberian Branch, Novosibirsk 630090, Russia

[4] Heriot Watt Univ, Dept Phys, Edinburgh, Midlothian, Scotland

[5] LMU, Ctr NanoSci, D-80539 Munich, Germany

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2002年 / 13卷 / 2-4期

基金：

俄罗斯基础研究基金会;

关键词：

nanostructures; excitons; quantum rings; magnetic field;

D O I：

10.1016/S1386-9477(01)00542-2

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study theoretically the magnetic-field effect on a neutral, but polarizable exciton confined in quantum-ring structures. For excitons with a nonzero dipole moment, a novel magnetic interference effect occurs: The ground state of an exciton confined in a finite-width quantum ring possesses a nonzero angular momentum with increasing normal magnetic field. This effect is accompanied by a suppression of the photoluminescence in well-defined magnetic-field intervals. The magnetic interference effect is calculated for type-II quantum dots and quantum rings. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：297 / 300

页数：4

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