Allowed combinations and overtones of vibrational modes in wurtzite GaN

被引：14

作者：

Kunert, HW ^{[1
]}

机构：

[1] Univ Pretoria, Dept Phys, ZA-0002 Pretoria, South Africa

来源：

APPLIED SURFACE SCIENCE | 2003年 / 212卷

关键词：

Raman spectroscopy; group theory; semiconductors; galium nitride;

D O I：

10.1016/S0169-4332(03)00474-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Using the standard method of placing displacement vectors upon each ion in the basis (Ga and N), and reducing this displacement representation we obtain eight allowed vibrational modes in crystals with the space group C-6v(4). Decomposing the symmetrized Kronecker Product (KP) of the vector representation we obtain six first-order Raman active modes at the zone center of the Brillouin zone (BZ). We have determined the allowed combination and overtones of these first-order Raman modes (at k = 0). Performing inelastic light scattering experiments (ILS) we have verified the derived selection rules for combinations and overtones. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：890 / 896

页数：7