首页> 中文期刊> 《中国物理快报:英文版》 >Effect of Interface Structure on Thermal Boundary Conductance by using First-principles Density Functional Perturbation Theory

Effect of Interface Structure on Thermal Boundary Conductance by using First-principles Density Functional Perturbation Theory

         

摘要

We choose a Si/Ge interface as a research object to investigate the influence of interface disorder on thermal boundary conductance.In the calculations,the diffuse mismatch model is used to study thermal boundary conductance between two non-metallic materials,while the phonon dispersion relationship is calculated by the first-principles density functional perturbation theory.The results show that interface disorder limits thermal transport.The increase of atomic spacing at the interface results in weakly coupled interfaces and a decrease in the thermal boundary conductance.This approach shows a simplistic method to investigate the relationship between microstructure and thermal conductivity.

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