Lattice vibrational properties of ZnMgO grown by pulsed laser deposition

被引：17

作者：

Belogorokhov, A. I.

Polyakov, A. Y.

Smirnov, N. B.

Govorkov, A. V.

Kozhukhova, E. A.

Kim, H. S.

Norton, D. P.

Pearton, S. J.

机构：

[1] Inst Rare Met, Moscow 119017, Russia

[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 19期

基金：

俄罗斯基础研究基金会; 美国国家科学基金会;

关键词：

D O I：

10.1063/1.2738196

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Vibrational modes were studied in n-type and p-type ZnMgO films doped with P (Mg composition of 7 at. %) grown by pulsed laser deposition on sapphire. The characteristic phonon frequencies were deduced from the analysis of IR reflectance measured by Fourier-transform spectroscopy. From comparison with similarly grown ZnO (P) films, Mg incorporation reduced the frequency of TO phonons by 14.5 cm(-1) and introduced two Mg related modes near 530 and 969 cm(-1). The first is likely to belong to the local vibrational mode of substitutional Mg, and the second is tentatively attributed to strongly lattice relaxed off-center Mg atoms. In addition, it was found that Mg incorporation triggers the formation of two phonon bands with characteristic frequencies of 501 and 634 cm(-1) that most likely belong to lattice defects. (C) 2007 American Institute of Physics.

引用

页数：3

共 28 条

[1] Fabrication and photoluminescent characteristics of ZnO/Mg0.2Zn0.8O coaxial nanorod single quantum well structures [J].