Theory of photoexcited carrier relaxation across the energy gap of phase-ordered materials

Ono, Shota; Shima, Hiroyuki; Toda, Yasunori

Physical Review B, 2012, 86(10), 104512

Permalink : https://hdl.handle.net/2115/50422

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アクセス権	open access
URI	https://hdl.handle.net/2115/50422
タイトル	Theory of photoexcited carrier relaxation across the energy gap of phase-ordered materials
著者	Ono, Shota ; Shima, Hiroyuki ; Toda, Yasunori
著者名 Ono, Shota
e-Rad_Researcher 40312392 著者名 Shima, Hiroyuki
e-Rad_Researcher 00313106 著者名 Toda, Yasunori
言語	英語
発行日	2012-09-01
出版者	American Physical Society
収録物名	Physical Review B
巻(号)	86(10)
ページ	104512
抄録	We develop a theory to describe the energy relaxation of photoexcited carriers in low-temperature ordered states with a band-gap opening. Carrier relaxation time τ near and below transition temperature Tc is formulated by examining the contributions from different carrier-phonon scatterings to the relaxation rate. Transverse acoustic phonon modes are found to play a crucial role in carrier relaxation; their heat capacity determines the τ divergence near Tc. Remarkable agreements with the theory and experimental data on two different materials which exhibit contrasting τ(T) behaviors are also demonstrated.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
権利情報	©2012 American Physical Society
PISSN	1098-0121
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.1103/PhysRevB.86.104512