Supersonic regimes of motion of a topological soliton

Journal Article · Fri Sep 01 04:00:00 EDT 1995 · Journal of Experimental and Theoretical Physics

OSTI ID:274041

Savin, A V ^[1]

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1. State Inst. of Physicomechanical Problems, Moscow (Russian Federation)

Supersonic regimes of motion of a topological soliton in a bistable molecular chain with cubic anharmonicity of the site-site interaction are studied for the first time. In the framework of the {phi}{sup 4} model, it is shown that in a bistable symmetric system, anharmonicity of the site-site interaction leads to the result that a positive topological soliton (kink) has a subsonic continuous spectrum and a supersonic discrete spectrum of velocity values. The topological soliton can have only a finite number of supersonic velocity values for which its motion is not accompanied by the emission of phonons. With increase of the anharmonicity, the number of such values increases. Each supersonic topological soliton is a bound state of several acoustic solitons, the sum of the amplitudes of which coincides with the width of the barrier of the two-well potential. 10 refs., 8 figs.

• OSTI ID: 274041
• Journal Information: Journal of Experimental and Theoretical Physics, Journal Name: Journal of Experimental and Theoretical Physics Journal Issue: 3 Vol. 81; ISSN 1063-7761; ISSN JXTPAS
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRYSTALS
EQUATIONS OF MOTION
HAMILTONIANS
PHI4-FIELD THEORY
PHONONS
SOLITONS