Journal
PHYSICAL REVIEW E
Volume 85, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.85.020102
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Funding
- NNSF [10805036, 10925525, 10975115, 11147191]
- SRFDP [20100121110021]
- Fuzhou University [022390]
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For one-dimensional nonlinear lattices with momentum conserving interparticle interactions, intensive studies have suggested that the heat conductivity kappa diverges with the system size L as kappa similar to L-alpha and the value of alpha is universal. But in the Fermi-Pasta-Ulam-beta lattices with nearest-neighbor (NN) and next-nearest-neighbor (NNN) coupling, we find that alpha strongly depends on gamma, the ratio of the NNN coupling to the NN coupling. The correlation between the gamma-dependent heat conduction behavior and the in-band discrete breathers is also analyzed.
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