Dependence of thermal conductivity on discrete breathers in lattices

G. P. Tsironis; A. R. Bishop; A. V. Savin; A. V. Zolotaryuk

doi:10.1103/PhysRevE.60.6610

Dependence of thermal conductivity on discrete breathers in lattices

G. P. Tsironis, A. R. Bishop, A. V. Savin, and A. V. Zolotaryuk

Phys. Rev. E 60, 6610 – Published 1 December 1999

Abstract

We study the properties of heat conduction in chains of coupled particles subjected to different anharmonic on-site potentials. Particular emphasis is placed on the role of breathers in saturation of the thermal conductivity for chains with hard anharmonicity. When the chain particles are subject to on-site potentials with soft anharmonicity, we find a characteristic temperature, below which the conductivity decreases but while above which it increases.

Received 7 June 1999

DOI:https://doi.org/10.1103/PhysRevE.60.6610

Authors & Affiliations

G. P. Tsironis and A. R. Bishop

Theory Division and Center for Nonlinear Studies, MS-B258, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

A. V. Savin and A. V. Zolotaryuk

Department of Physics, University of Crete, and Foundation for Research and Technology, Hellas (FORTH), P.O. Box 2208, 71003 Heraklion, Greece

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Vol. 60, Iss. 6 — December 1999

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Physical Review E

covering statistical, nonlinear, biological, and soft matter physics