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Urbach–Martienssen tails in a wurtzite GaN epilayer

 

作者: S. Chichibu,   T. Mizutani,   T. Shioda,   H. Nakanishi,   T. Deguchi,   T. Azuhata,   T. Sota,   S. Nakamura,  

 

期刊: Applied Physics Letters  （AIP Available online 1997）
卷期: Volume 70, issue 25  

页码: 3440-3442

 

ISSN:0003-6951

 

年代: 1997

 

DOI:10.1063/1.119196

 

出版商: AIP

 

数据来源: AIP

 

摘要:

Effects of an interaction between the electronic and lattice systems on the optical spectra of a wurtzite GaN epilayer were investigated. The exponentially increasing absorption tail was well explained as an Urbach–Martienssen tail, giving the characteristic phonon energy of 30 meV. The result indicates that few longitudinal optical phonons contribute to the exciton-phonon coupling even at room temperature. ©1997 American Institute of Physics.

 

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