Enhanced binding energy of one-dimensional excitons in quantum wires

被引：113

作者：

Someya, T

Akiyama, H

Sakaki, H

机构：

[1] RES DEV CORP JAPAN,PRESTO,NAKANO KU,TOKYO,JAPAN

[2] RES DEV CORP JAPAN,QUANTUM TRANSIT PROJECT,MEGURO KU,TOKYO,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.76.2965

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photoluminescence spectra are systematically studied on a series of 5 nm scale, T-shaped, GaAs quantum wires (QWRs). Potential profiles and quantized energies of QWRs are precisely determined as a function of structure parameters. By comparing the experimental quantized energy with the calculation without the Coulomb interaction, the binding energy E(b) of one-dimensional (1D) excitons is quantitatively evaluated. Upon increasing the 1D confinement, E(b) in QWRs is found to be enhanced to 27 +/- 3 meV, which is 6-7 times larger than the bulk value.

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页码：2965 / 2968

页数：4

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