Finite thermal conductivity in 1D lattices
Year: 2000
Authors: Giardina C., Livi R., Politi A., Vassalli M.
Autors Affiliation: Dipartimento di Fisica, Università di Bologna, Via Irnerio 46, 40126 Bologna, Italy;
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Bologna, Italy;
Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy;
Dipartimento di Fisica, Università di Firenze, Largo E. Fermi 2, 50125 Firenze, Italy;
Istituto Nazionale di Fisica della Materia, Unità di Firenze, Firenze, Italy
Abstract: We discuss the thermal conductivity of a chain of coupled rotators, showing that it is the first example of a 1D nonlinear lattice exhibiting normal transport properties in the absence of an on-site potential. Numerical estimates obtained by simulating a chain in contact with two thermal baths at different temperatures are found to be consistent with those based on linear response theory. The dynamics of the Fourier modes provides direct evidence of energy diffusion. The finiteness of the conductivity is traced back to the occurrence of phase jumps. Our conclusions are confirmed by the analysis of two variants of this model.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 84 (10) Pages from: 2144 to: 2147
KeyWords: HEAT-CONDUCTION; OSCILLATORS; DYNAMICS; SYSTEMS; CHAINSDOI: 10.1103/PhysRevLett.84.2144Citations: 211data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-04-28References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here