Numerical evidence for the bottleneck frequency of quasidiffusive acoustic phonons

Tamura, Shin-ichiro

PHYSICAL REVIEW B, 1997, 56(21), 13630-13633

Permalink : https://hdl.handle.net/2115/5918

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アクセス権	open access
URI	https://hdl.handle.net/2115/5918
タイトル	Numerical evidence for the bottleneck frequency of quasidiffusive acoustic phonons
著者	e-Rad_Researcher 80109488 著者名 Tamura, Shin-ichiro 田村, 信一朗
言語	英語
発行日	1997
出版者	American Physical Society
収録物名	PHYSICAL REVIEW B
巻(号)	56(21)
ページ	13630-13633
抄録	A kinetic equation on quasidiffusion of phonons was recently analyzed by Esipov and he predicted the existence of a bottleneck frequency (νBN) which separates the phonons decaying from those diffusing to a detector. We have solved numerically the kinetic equation and obtained the temporal evolution of phonon concentration excited at the center of a spherical sample. We have also performed Monte Carlo simulations of phonon propagation in the same geometry. At a time much later than the ballistic arrival time of phonons, both sets of results exhibit a sharp peak in the phonon concentration around the predicted νBN. With Monte Carlo simulations we have also confirmed the same relaxation rate for the phonons of frequencies ν<νBN.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	Copyright © 1997 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.56.13630