Computer Experiment on Solitons in One-Dimensional Anharmonic Crystals

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概要

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• Computer simulation has been carried out for visualizing solitons and phonons propagating in one-dimensional mass-spring model crystals using the molecular dynamics method. Lattice anharmonicity up to the fourth order in interatomic potential was taken into account. Two kinds of experiments were performed: multiple-pulse input applied to an isolated linear crystal, and single-pulse input applied to a circular crystal. The kinetic energies or displacements of atoms in the crystals were computed after the pulse application. In the first case, phonons were mainly produced together with a preceding soliton, while in the second case, solitons of opposite sign with small tails composed of phonons were produced. The propagation velocities were different for solitons and phonons, and were respectively quite stable and unstable for mutual collisions. The velocity of solitons was determined for various input pulse amplitudes and amounts of lattice anharmonicity. The velocity was found to be enhanced by the increase of the pulse amplitude and the strength of anharmonicity of crystal lattice.

• 社団法人応用物理学会の論文
• 1995-05-30

著者

• Hiki Y

  Faculty Of Science Tokyo Institute Of Technology

• Hiki Yoshio

  Faculty Of Science Tokyo Institute Of Technology

• Ozawa Satoru

  Applied Physics Group Faculty Of Engineering Ibaraki University

関連論文

• Computer Experiments on Collisions of Solitons with Defects in Two-Dimensional Model Crystals
• Computer Experiment on Soliton Excitation in Two-Dimensional Crystals
• A Proposed Method of Thermoacoustic Spectroscopy : Photoacoustic Spectroscopy
• Computer Experiment on Collisions of Solitons with Defects in Crystals
• Computer Simulation of Conduction and Propagation of Phonons : Physical Acoustics
• Computer Simulation of Phonon Conduction in Langmuir-Blodgett Films : Physical Acoustics
• Computer Experiment on Solitons in One-Dimensional Anharmonic Crystals

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