Interface thermal resistance between dissimilar anharmonic lattice

TL;DR

This paper investigates the asymmetric interface thermal resistance between two dissimilar anharmonic lattices, analyzing how it varies with system parameters and discussing potential nanoscale heat management applications.

Contribution

It introduces a study of ITR asymmetry between FPU and FK models and explores its dependence on various physical parameters.

Findings

ITR is asymmetric depending on temperature gradient direction

ITR varies with coupling strength, temperature, and system size

Potential applications in nanoscale heat control are discussed

Abstract

We study interface thermal resistance (ITR) in a system consisting of two dissimilar anharmonic lattices exemplified by Fermi-Pasta-Ulam (FPU) model and Frenkel-Kontorova (FK) model. It is found that the ITR is asymmetric, namely, it depends on how the temperature gradient is applied. The dependence of the ITR on the coupling constant, temperature, temperature difference, and system size are studied. Possible applications in nanoscale heat management and control are discussed.