Influences of biaxial strains on the vibrational and exciton energies in ZnO

被引：78

作者：

Gruber, T ^{[1
]}

Prinz, GM ^{[1
]}

Kirchner, C ^{[1
]}

Kling, R ^{[1
]}

Reuss, F ^{[1
]}

Limmer, W ^{[1
]}

Waag, A ^{[1
]}

机构：

[1] Univ Ulm, Abt Halbleiterphys, D-89069 Ulm, Germany

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 96卷 / 01期

关键词：

D O I：

10.1063/1.1755433

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the structural, optical, and vibrational properties of strained heteroepitaxial ZnO layers by high resolution x-ray diffraction, reflectivity, and Raman measurements. The ZnO layers were grown by metalorganic vapor phase epitaxy on sapphire substrates under varying growth conditions. A Poisson number of mu=0.303 and phonon deformation-potential parameters of a=-690 cm(-1), b=-940 cm(-1) for the high-energy E-2 optical phonon mode have been determined. The shift of the excitonic resonances due to the strain in the layers agrees well with the experimentally determined Poisson ratio using the deformation-potentials D-1-D-4 determined by Wrzesinski and Frohlich [Phys. Rev. B 56, 13087 (1997)]. (C) 2004 American Institute of Physics.

引用

页码：289 / 293

页数：5

共 27 条

[11] A challenge in molecular beam epitaxy of ZnO: control of material properties by interface engineering [J].