Isotope scattering of large-wave-vector phonons in GaAs and InSb : Deformation-dipole and overlap-shell models

Tamura, Shin-ichiro

Physical Review B, 1984, 30(2), 849-854

Permalink : https://hdl.handle.net/2115/5954

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アクセス権	open access
URI	https://hdl.handle.net/2115/5954
タイトル	Isotope scattering of large-wave-vector phonons in GaAs and InSb : Deformation-dipole and overlap-shell models
著者	e-Rad_Researcher 80109488 著者名 Tamura, Shin-ichiro 田村, 信一朗
言語	英語
発行日	1984-07-15
出版者	American Physical Society
収録物名	Physical Review B
巻(号)	30(2)
ページ	849-854
抄録	Scatterings of near-zone-boundary phonons by isotopic disorder in diatomic GaAs InSb crystals are studied theoretically. In multiatomic lattices the scattering rate depends importantly on the vibrational amplitudes of constituent atoms. We find that the wave-vector dependences of these amplitudes, which are predicted by some lattice models, show quite dissimilar behaviors as compared to others. The typical examples investigated in this paper are the deformation-dipole model and the overlap-shell model. With the use of these models the frequency dependence of the relaxation time of phonons is calculated. Both models, however, predict the relaxation time of about 0.1 μsec for 1-THz TA phonons in GaAs, which is at least 1 order of magnitude shorter than the lifetime reported by Ulbrich et al.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright © 1984 American Physical Society
PISSN	0163-1829
関連情報	URI http://www.aps.org/
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.30.849