TEMPERATURE-DEPENDENCE OF RAMAN-SCATTERING BY ACOUSTIC PHONONS IN A SUPERLATTICE GAAS/ALGAAS IN STRONG MAGNETIC-FIELDS

被引：18

作者：

MIRLIN, DN ^{[1
]}

MERKULOV, IA ^{[1
]}

PEREL, VI ^{[1
]}

RESHINA, II ^{[1
]}

SIRENKO, AA ^{[1
]}

PLANEL, R ^{[1
]}

机构：

[1] LAB MICROSTRUCT & MICROELECTR,CNRS,F-92225 BAGNEUX,FRANCE

来源：

SOLID STATE COMMUNICATIONS | 1992年 / 84卷 / 12期

关键词：

D O I：

10.1016/0038-1098(92)90692-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We observed simultaneously two types of Raman spectra in a GaAs/AlGaAs superlattice under high magnetic field: a folded longitudinal acoustic phonon, I(FA), and a structureless background, I(B). The temperature dependence of the intensities in both spectra was studied in the range 2-100K and it was established that the background spectrum is due to the first-order Raman scattering from acoustic phonons with a wide range of wave vectors. We obtained the expression for the intensities ratio. I(B)/I(FA). It depends on the relationship between the homogeneous and the inhomogeneous broadening of the intermediate state of the photoexcited e-h pair. A rapid decrease of I(B) observed at T>30K is thought to be due to the increase of the homogeneous width with temperature.

引用

页码：1093 / 1097

页数：5