Anomalously long lifetimes of high-energy surface acoustic phonons

Tamura, Shin-ichiro

Physical Review B, 1984, 30(2), 610-617

Permalink : https://hdl.handle.net/2115/5953

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アクセス権	open access
URI	https://hdl.handle.net/2115/5953
タイトル	Anomalously long lifetimes of high-energy surface 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	1984-07-15
出版者	American Physical Society
収録物名	Physical Review B
巻(号)	30(2)
ページ	610-617
抄録	The lifetime of Rayleigh surface phonons as opposed to decay via anharmonic three-phonon processes is calculated in the regime ℏωR≫kBT. The surface phonon decays predominantly by combining with a bulk transverse phonon to create another bulk transverse phonon. The energymomentum conservation of the processes imposes the condition that those bulk phonons which may interact with the surface phonons should possess frequencies of the same order of ωR. However, such high-frequency phonons are rarely excited thermally under the condition considered here, leading to an anomalously long lifetime of the surface phonons in proportion to ωR-4.5T(-0.5)exp(A ℏωR/kBT), where A is a constant of the order of 0.1. We also estimate numerically the magnitude of the lifetime
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.30.610