A Quantum Theory of Atomic Diffusion in a Model Crystal
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概要
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Jump rate of an interstitial atom is calculated quantum-mechanically in a model crystal which is made of a linear chain of diatomic molecules. Normal modes of the system are exactly determined in order to investigate effects of perturbed lattice vibrations on diffusion processes. These modes play distinct roles depending on their symmetry under reflection about a site of the diffusing atom. At high temperature the rate has two types of activation energy whose physical origins are quite different. If the mass of the atom is sufficiently light, the rate shows strong deviations from the ordinary Arrhenius formula.
- 社団法人日本物理学会の論文
- 1976-04-15
著者
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Uemura Yasutada
Department Of Physics University Of Tokyo
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Uemura Yasutada
Department Of Dynamics Faculty Of Engineering Tokyo University
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FUJII Syuso
Department of Physics, University of Tokyo
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