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Abstract:
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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PHYSICAL REVIEW E
ISSN: 1539-3755
Year: 2012
Issue: 2
Volume: 85
2 . 3 1 3
JCR@2012
2 . 2 0 0
JCR@2023
ESI Discipline: PHYSICS;
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 46
SCOPUS Cited Count: 47
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
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