Computer Experiment on Collisions of Solitons with Defects in Crystals
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概要
- 論文の詳細を見る
Molecular dynamics computer simulation has been performed for solitons and phonons propagating in one-dimensional anharmonic mass-spring model crystals. Lattice anharmonicity up to the fourth order in interatomic potential was taken into account. An input pulse displacement was applied to two neighboring atoms in a crystal, and the displacements and kinetic energies of all atoms in the crystal were computed. When the input pulse is small, phonon packets propagating in opposite directions are produced, whereas for a large input pulse solitons of opposite signs with tails consisting of phonons are excited. Collisions of the solitons and phonons with three kinds of lattice defect-mass, spring-constant, and anharmonicity defects-were investigated to obtain the energy transmission coefficients for the collisions and the changes in propagation velocities after the collisions. Reflection characteristics of the defects are markedly different for solitons and phonons.
- 社団法人応用物理学会の論文
- 1996-05-30
著者
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Hiki Yosio
Faculty Of Engineering Ibaraki University
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Hiki Yosio
Faculty Of Science Tokyo Institute Of Technology
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OZAWA Satoru
Applied Physics Group, Faculty of Engineering, Ibaraki University
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Ozawa Satoru
Applied Physics Group Faculty Of Engineering Ibaraki University
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