HOLE DELOCALIZATION IN CDTE CD1-XZNXTE QUANTUM-WELLS

被引：8
|
作者：
ALEXANDROU, A
JACKSON, MK
HULIN, D
MAGNEA, N
MARIETTE, H
DAUBIGNE, YM
机构：
[1] CEA,DEPT RECH FONDAMENTALE MAT CONDENSEE,F-38041 GRENOBLE,FRANCE
[2] UNIV J FOURIER,SPECTROMETR PHYS LAB,F-38402 ST MARTIN DHERES,FRANCE
来源：
PHYSICAL REVIEW B | 1994年 / 50卷 / 04期
关键词：
D O I：
10.1103/PhysRevB.50.2727
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on femtosecond pump-probe absorption measurements in CdTe/Cd1-xZnxTe quantum wells with an unusual distribution of band offset: almost all the band-gap difference between the two constituent materials is found as a conduction-band offset. We have observed a blueshift of the exciton energy due to hard-core repulsion between excitons and an intriguing redshift in the presence of free electron-hole pairs. We evaluate the redshift due to different mechanisms and conclude that the redshift observed is due to hole delocalization throughout the structure resulting from the very shallow valence-band potential wells.
引用
收藏
页码：2727 / 2730
页数：4
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