title: Nonuniversal heat conduction of one-dimensional lattices.
abstract: For one-dimensional nonlinear lattices with momentum conserving interparticle interactions, intensive studies have suggested that the heat conductivity κ diverges with the system size L as κ~L(α) and the value of α is universal. But in the Fermi-Pasta-Ulam-β lattices with nearest-neighbor (NN) and next-nearest-neighbor (NNN) coupling, we find that α strongly depends on γ, the ratio of the NNN coupling to the NN coupling. The correlation between the γ-dependent heat conduction behavior and the in-band discrete breathers is also analyzed.
authors.affiliation: Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, Fujian, China.
authors.forename: Daxing
authors.initials: D
authors.lastname: Xiong
authors.forename: Jiao
authors.initials: J
authors.lastname: Wang
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
mesh_terms: D003198:Computer Simulation; D008962:Models, Theoretical; D013814:Thermal Conductivity