Intriguing Heat Conduction of a Polymer Chain

Details Intriguing Heat Conduction of a Polymer Chain Intriguing Heat Conduction of a Polymer Chain

2003-08-22

arxiv.org/abs/cond-mat/0308445v1

Phys. Rev. Lett. 92 (2004) 074302.

Physics

Condensed Matter

Statistical Mechanics

4 pages

Scientific paper

10.1103/PhysRevLett.92.074302

We study heat conduction in a one-dimensional chain of particles with longitudinal as well as transverse motions. The particles are connected by two-dimensional harmonic springs together with bending angle interactions. Using equilibrium and nonequilibrium molecular dynamics, three types of thermal conducting behaviors are found: a logarithmic divergence with system sizes for large transverse coupling, 1/3 power-law at intermediate coupling, and 2/5 power-law at low temperatures and weak coupling. The results are consistent with a simple mode-coupling analysis of the same model. The 1/3 power-law divergence should be a generic feature for models with transverse motions.

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