OBSERVATION OF NEGATIVELY CHARGED EXCITONS X- IN SEMICONDUCTOR QUANTUM-WELLS

被引：667

作者：

KHENG, K ^{[1
]}

COX, RT ^{[1
]}

DAUBIGNE, YM ^{[1
]}

BASSANI, F ^{[1
]}

SAMINADAYAR, K ^{[1
]}

TATARENKO, S ^{[1
]}

机构：

[1] UNIV GRENOBLE 1,CNRS,SPECT PHYS LAB,F-38402 ST MARTIN DHERES,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.71.1752

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The negatively charged exciton X- is identified by its circular polarization properties in 1.7 K magnetoabsorption spectra of CdTe-Cd1-xZnxTe multiple quantum wells modulation doped with electron concentrations N(s) almost-equal-to 2 x 10(10) to 1.5 x 10(11) cm-2. The binding energy of the second electron of X- is 0.20 3D rydbergs at 100 angstrom well width. The species X- and the neutral exciton X exist in zero field for low N(s). At N(s) = 1.45 x 10(11) cm-2 a Fermi edge singularity is seen at B = 0 but X- appears with field, at filling factor nu = 2, while X appears at nu = 1.

引用

页码：1752 / 1755

页数：4

共 16 条

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