OPTICAL-PHONON-ASSISTED AND ACOUSTICAL-PHONON-ASSISTED HOPPING OF LOCALIZED EXCITONS IN CDTE/ZNTE QUANTUM-WELLS

被引：56

作者：

KALT, H

COLLET, J

BARANOVSKII, SD

SALEH, R

THOMAS, P

DANG, LS

CIBERT, J

机构：

[1] UNIV TOULOUSE 3,PHYS SOLIDES LAB,F-31062 TOULOUSE,FRANCE

[2] AF IOFFE PHYS TECH INST,ST PETERSBURG 194021,RUSSIA

[3] MAX PLANCK INST FESTKORPERFORSCH,W-7000 STUTTGART 80,GERMANY

[4] UNIV MARBURG,ZENTRUM MAT WISSENSCH,FACHBEREICH PHYS & WISSENSCH,W-3550 MARBURG,GERMANY

[5] UNIV J FOURIER,SPECTROMETRIE PHYS LAB,F-38402 ST MARTIN DHERES,FRANCE

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.45.4253

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Interaction with both acoustical as well as optical phonons contributes to the relaxation of excitons in tail states of coherently strained CdTe/ZnTe quantum wells. The contribution of acoustical phonons is most important in the thinnest well of 1.8 monolayers. Hopping down, which involves the emission of acoustic phonons, leads to a redshift of the luminescence band of about 10 meV within the first 200 ps after excitation. A comparison of the experimental data with results of a quantitative theory allows us to evaluate the concentration of localized states involved in the relaxation process.

引用

页码：4253 / 4257

页数：5

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