STRONGLY DISPERSIVE LOW-FREQUENCY RAMAN MODES IN GERMANIUM

被引：8

作者：

BANSAL, ML ^{[1
]}

SOOD, AK ^{[1
]}

CARDONA, M ^{[1
]}

机构：

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

来源：

SOLID STATE COMMUNICATIONS | 1991年 / 78卷 / 07期

关键词：

D O I：

10.1016/0038-1098(91)90381-5

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the observation of unexpected low frequency (10 cm-1 - 70 cm-1) features in, the Raman spectra of germanium. The frequencies of these modes depend upon the excitation wavelength of the laser. We propose that these features are due to scattering by two acoustic phonons of large wave vectors resonant at the E1 and E1 + DELTA-1 gaps. This provides a method of determining the reduced masses of the E1 and E1 + DELTA-1 critical points.

引用

页码：579 / 582

页数：4

共 17 条

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