Abstract
A heat transfer process is studied in a one-dimensional lattice of coupled rotators in which the orientation interaction between neighboring units is described by the periodic potential. Using this system as an example, it is demonstrated for the first time that one-dimensional lattices with a finite thermal conductivity in the thermodynamic limit can exist without substrate potential. As the temperature increases, the given system transforms from the state with an infinite thermal conductivity to the state with a finite thermal conductivity. The finiteness of the thermal conductivity stems from the existence of localized stationary excitations that interfere with heat transfer in the lattice. The lifetime and the concentration of these excitations increase with an increase in the temperature, which leads to a monotonic decrease in the thermal conductivity coefficient.
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Translated from Fizika Tverdogo Tela, Vol. 43, No. 2, 2001, pp. 341–349.
Original Russian Text Copyright © 2001 by Savin, Gendel’man.
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Savin, A.V., Gendel’man, O.V. On the finite thermal conductivity of a one-dimensional rotator lattice. Phys. Solid State 43, 355–364 (2001). https://doi.org/10.1134/1.1349488
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DOI: https://doi.org/10.1134/1.1349488