Eleventh International Conference on Internal Friction and Ultrasonic Attenuation in Solids
J. Phys. IV France 06 (1996) C8-841-C8-844
Solitons as a Possible Probe for Detecting Defects in SolidsS. Ozawa1, H. Tanaka2 and Y. Hiki3
1 Applied Physics Group, Faculty of Engineering, Ibaraki University, Nahanarusawa, Hitachi 316, Japan
2 NTT Data Communications Systems Co., 5-10-24 Nishikasai, Edogawa-ku, Tokyo 134, Japan
3 Faculty of Science, Tokyo Institute of Technology, Emeritus, 39-3-303 Motoyoyogi, Shibuya-ku, Tokyo 151, Japan
Molecular dynamics computer simulation has been performed for solitons and phonons propagating in one- and two-dimensional anharmonic mass-spring model crystals. An input pulse displacement was applied to atoms in a crystal, and propagating phonons or solitons were produced when the input pulse was smaller or larger. Collisions of the solitons and phonons with mass, spring constant, and anharmonicity defects were studied to obtain the energy transmission coefficients for collisions. Collision characteristics were different for solitons and phonons.
© EDP Sciences 1996