Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
73 (1998), S. 34-36
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We report the measured phonon density of states of a bulk GaN powder by time-of-flight neutron spectroscopy. The observed one-phonon excitation spectrum consists of two broad bands centered at about 23 and 39 meV corresponding to the acoustic and the first group of optical phonons; two sharp bands of upper optic modes at about 75 and 86 meV; and a gap of 45–65 meV. The phonon dispersion curves, lattice specific heat, and Debye temperature are calculated from fitting the data with a rigid-ion model. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.121714
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