Heat conduction of multilayer nanostructures with consideration of coherent and incoherent phonon transport  

作　　者：Bin Liu Yangyu Guo Vladimir I.Khvesyuk Alexander A.Barinov Moran Wang 

机构地区：[1]Department of Thermophysics,Bauman Moscow State Technical University,Moscow 105005,Russia [2]Institut Lumière Matière,UniversitéClaude Bernard Lyon 1-CNRS,Universitéde Lyon,Villeurbanne 69622,France [3]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education and Center for Flexible Electronics Technology,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》2022年第10期9492-9497,共6页纳米研究（英文版）

摘　　要：We report a theoretical investigation of coherent-to-incoherent heat conduction in multilayer nanostructures.In the coherent regime where the phonon motion is quasi-harmonic,the elastic continuum model gives accurate cross-plane thermal conductivity predictions of upper limits and demonstrates that the coherent transport is the result of the interplay between intrinsic wave effects.As the temperature or system size increases,the phonon dephasing scattering results in the deviation of thermal conductivity from the coherent-limit calculation.By further introducing the incoherence of phonons,we reproduce the classical minimum thermal conductivity,indicating the feasibility of extending the pure wave model into the wave-particle crossing regime.

关 键 词：GaAs/AlAs superlattices thermal conductivity coherent and incoherent phonon transport continuum model 

分 类 号：O57[理学—粒子物理与原子核物理]