Temperature and pressure dependence of Mg local modes in GaN

被引：4

作者：

Kaczmarczyk, G ^{[1
]}

Kaschner, A ^{[1
]}

Hoffmann, A ^{[1
]}

Thomsen, C ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany

来源：

APPLIED PHYSICS LETTERS | 2001年 / 78卷 / 02期

关键词：

D O I：

10.1063/1.1339848

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temperature and pressure dependence of the zone-center phonons and of the local vibrational modes of magnesium in the hexagonal modification of GaN was studied within a valence-force model. The contribution caused by thermal expansion was calculated and compared with the experiment. We find that the frequency shift of the local vibrational modes arises to a much larger extent from anharmonic decay into lower energy phonons than the shift of the GaN host modes. (C) 2001 American Institute of Physics.

引用

页码：198 / 200

页数：3

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