Abstract
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, power law at intermediate coupling, and power law at low temperatures and weak coupling. The results are consistent with a simple mode-coupling analysis of the same model. We suggest that the power-law divergence should be a generic feature for models with transverse motions.
- Received 22 August 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.074302
©2004 American Physical Society