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Updated: May 27, 2026

Characterization of Thermal Transport in One-dimensional Solid Materials
Published on: January 26, 2014
Anomalous negative differential thermal resistance in a momentum-conserving lattice
Wei-Rong Zhong1, Mao-Ping Zhang, Bao-Quan Ai
1Department of Physics and Siyuan Laboratory, College of Science and Engineering, Jinan University, Guangzhou 510632, China.
Abstract:
A two-segment Fermi-Pasta-Ulam lattice has been investigated by using nonequilibrium molecular dynamics. Here we present an anomalous negative differential thermal resistance (NDTR) that has not been reported in Frenkel-Kontorova and φ(4) lattices up to the present. The NDTR disappears in the low-temperature region. The region of NDTR shifts from the large to the small temperature difference region as the system size increases. The anomalous dependence of NDTR on the temperature can be explained as the negative effect induced by the nonlinear coupling. The explanation can also cover the phenomenon of NDTR in momentum-nonconserved lattices.
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