Temperature dependence of thermal conductivity in 1D nonlinear lattices

Details Temperature dependence of thermal conductivity in 1D nonlinear lattices Temperature dependence of thermal conductivity in 1D nonlinear lattices

2007-03-22

arxiv.org/abs/cond-mat/0703567v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

6 pages and 2 figures. Accepted for publication in Europhys. Lett

Scientific paper

We examine the temperature dependence of thermal conductivity of one dimensional nonlinear (anharmonic) lattices with and without on-site potential. It is found from computer simulation that the heat conductivity depends on temperature via the strength of nonlinearity. Based on this correlation, we make a conjecture in the effective phonon theory that the mean-free-path of the effective phonon is inversely proportional to the strength of nonlinearity. We demonstrate analytically and numerically that the temperature behavior of the heat conductivity $\kappa\propto1/T$ is not universal for 1D harmonic lattices with a small nonlinear perturbation. The computer simulations of temperature dependence of heat conductivity in general 1D nonlinear lattices are in good agreements with our theoretic predictions. Possible experimental test is discussed.

Affiliated with

Also associated with

No associations

Rating

Temperature dependence of thermal conductivity in 1D nonlinear lattices does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Temperature dependence of thermal conductivity in 1D nonlinear lattices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature dependence of thermal conductivity in 1D nonlinear lattices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-167981