Two-dimensional charged magneto-excitons: magnetic translations and localization

被引：11

作者：

Dzyubenko, AB ^{[1
]}

Sivachenko, AY

机构：

[1] Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany

[2] Weizmann Inst Sci, IL-76100 Rehovot, Israel

来源：

PHYSICA E | 2000年 / 6卷 / 1-4期

关键词：

magnetic translations; magnetic localization; charged magneto-excitons;

D O I：

10.1016/S1386-9477(99)00119-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For composite complexes - quasi-two-dimensional (2D) charged magneto-excitons X- - we propose a new exact classification of states, which is based on magnetic translations. We consider implications of this symmetry for magneto-optical transitions. It is shown, in particular, that in a translationally invariant system with a simple valence band, the ground triplet X-t(-) state is dark in interband transitions at finite magnetic fields B. This exact result calls for the re-interpretation of several previous theoretical studies. We consider the symmetry-breaking effects of spatial lateral confinement on internal transitions of charged complexes. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：226 / 229

页数：4

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