Electric-field tuning of spin-dependent exciton-exciton interactions in coupled quantum wells

被引：19

作者：

Aichmayr, G ^{[1
]}

Jetter, M

Viña, L

Dickerson, J

Camino, F

Mendez, EE

机构：

[1] Univ Autonoma Madrid, Dept Fis Mat C4, E-28049 Madrid, Spain

[2] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.83.2433

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have shown experimentally that an electric field decreases the energy separation between the two components of a dense spin-polarized exciton gas in a coupled double quantum well, from a maximum splitting of similar to 4 meV to zero, at a field of similar to 35 kV/cm. This decrease, due to the field-induced deformation of the exciton wave function, is explained by an existing calculation of the change in the spin-dependent exciton-exciton interaction with the electron-hole separation. However, a new theory that considers the modification of screening with that separation is needed to account for the observed dependence on excitation power of the individual energies of the two exciton components.

引用

页码：2433 / 2436

页数：4

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