Electron–phonon interactions in the wide band‐gap semiconductor GaN
作者:
S. J. Sheih,
K. T. Tsen,
D. K. Ferry,
A. Botchkarev,
B. Sverdlov,
A. Salvador,
H. Morkoc¸,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 67,
issue 12
页码: 1757-1759
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.115040
出版商: AIP
数据来源: AIP
摘要:
Picosecond Raman spectroscopy has been employed to study electron–phonon interactions in the wide band‐gap semiconductor GaN. By using very intense picosecond laser pulses in the visible spectral range, electron‐hole pairs were generated through the two‐photon absorption in GaN. The relaxation of these high energy electrons and holes were used to interrogate electron–phonon interactions. We have found that electrons thermalize toward the bottom of the conduction band by emitting primarily longitudinal optical phonons. Our work demonstrates that the Fro¨hlich interaction is much stronger than the deformation potential interaction in wurtzite GaN. ©1995 American Institute of Physics.
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