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Title: Thermal conductivity coefficient via temperature-dependent elementary excitation spectra in thin liquid ^4He(New Developments in Statistical Physics Similarities in Diversities,YITP Workshop)
Authors: Um, Chung-In
Yoo, Sahng-Kyoon
Lee, Soo-Young
Yeon, Kyu-Hwang
George, Thomas F.
Issue Date: 20-Jul-1993
Publisher: 物性研究刊行会
Journal title: 物性研究
Volume: 60
Issue: 4
Start page: 317
End page: 321
Abstract: The coefficient of thermal conductivity (κ) in thin liquid ^4He is evaluated explicitly as a function of temperature via temperature-dependent two-dimensional elementary excitation spectra that are microscopic only in the long-wavelength limit. Below about 0.8K, the coefficient increases exponentially with decreasing temperature. At temperatures below about 0.3K, κ(T) in the thin film case has an T^<-5> dependence with extra temperature-dependent terms which originate from three-phonon processes.
Description: この論文は国立情報学研究所の電子図書館事業により電子化されました。
Appears in Collections:Vol.60 No.4

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