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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