Biaxial strain dependence of exciton resonance energies in wurtzite GaN
作者:
Amane Shikanai,
Takashi Azuhata,
Takayuki Sota,
Shigefusa Chichibu,
Akito Kuramata,
Kazuhiko Horino,
Shuji Nakamura,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 81,
issue 1
页码: 417-424
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.364074
出版商: AIP
数据来源: AIP
摘要:
We have systematically studied the strain dependence of the free-exciton resonance energies in wurtzite GaN by photoreflectance measurements using well-characterized samples. The experimental data have been analyzed using the appropriate Hamiltonian for the valence bands in wurtzite GaN and determined the values of the crystal field splitting, the spin–orbit splitting, the shear deformation potential constants, and the energy gap in the unstrained crystal. Discussions are given on the strain dependence of the energy gaps, of the effective masses, and of the binding energies for the free-exciton ground states as well as on the valence-band parameters. ©1997 American Institute of Physics.
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