Computer Experiments on Scattering of Atomic Excitations by Defects in Model Crystals
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概要
- 論文の詳細を見る
A molecular dynamics computer simulation has been carried out for a monatomic, anharmonic, and two-dimensional hexagonal model crystal. Central forces between the nearest neighbor atoms and anharmonic forces up to the third order are considered. Pulse input displacements are applied to the line of atoms at one end of a rectangular crystal, and the atomic excitations propagating in the crystal are observed. The excitations are shown to be phonons or solitons when the applied pulse is small or large, respectively. A mass defect — an atom of which the mass is lighter or heavier than that of the lattice atoms — is placed near the center of the crystal. The excitation is scattered by the defect, and the simulations are made for various cases of large and small inputs, and light and heavy mass defects. The obtained results are represented using two-dimensional maps. The intention of the study and the significance of the results are briefly discussed.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2004-05-15
著者
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KOMURO Ryoichi
Graduate School of Science and Engineering, Ibaraki University
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MINATO Atsushi
Graduate School of Science and Engineering, Ibaraki University
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Hiki Yosio
Faculty Of Engineering Ibaraki University
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Itaba Masanori
Graduate School Of Science And Engineering Ibaraki University
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Ozawa Satoru
Graduate School Of Science And Engineering Ibaraki University
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Minato Atsushi
Graduate School of Science and Engineering, Ibaraki University, Nakanarusawa, Hitachi 316-0033, Japan
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Ozawa Satoru
Graduate School of Science and Engineering, Ibaraki University, Nakanarusawa, Hitachi 316-0033, Japan
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Minato Atsushi
Graduate School of Science and Engineering,
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