Phonons in Nonlinear and Nonequilibrium Systems and Thermal Conductivity
スポンサーリンク
概要
- 論文の詳細を見る
Heat transport and dynamical properties of a one-dimensional monatomic lattice with large quartic potentials are investigated using the molecular dynamics method. Energy is transported not only through diffusive processes but also nondiffusive processes. The nondiffusive energy flow is assigned to modified KdV solitons, which decrease with propagation distance due to collisions with thermally excited phonons with very short wavelength. The behavior of energy spreading resembles anomalous diffusion due to the nondiffusive current within a critical region N_<cr> or a critical time, 〓_<cr>=N_<cr>/υ, where υ denotes the velocity of the soliton. The diffusive behavior of energy spreading recovers beyond that region. Fourier's law is confirmed in the regime, and the thermal conductivity is found to be independent of local temperatures.
- 社団法人応用物理学会の論文
- 1993-05-30
著者
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Sakuma Tetsuro
Department Of Engineering Science Factuly Of Engineering Hokkaido University
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Nishiguchi Norihiko
Department Of Engineering Science Hokkaido University
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Nishiguchi Norihiko
Department Of Applied Physics Hokkaido University
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OHTSUBO Yuuki
Department of Engineering Science, Hokkaido University
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Ohtsubo Yuuki
Department Of Engineering Science Hokkaido University
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