Disentangling electronic and phononic thermal transport across two-dimensional interfaces  

作　　者：Linxin Zhai Zhiping Xu 翟麟鑫;徐志平

机构地区：[1]Applied Mechanics Laboratory,Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China

出　　处：《Chinese Physics B》2025年第2期401-406,共6页中国物理B(英文版)

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 12425201 and 52090032);the National Key Basic Research Program of China (Grant No. 2022YFA1205400)。

摘　　要：Electrical and thermal transport at two-dimensional(2D) interfaces is critical for semiconductor technology, yet their interplay remains unclear. We report a theoretical proposal to separate electronic and phononic contributions to thermal conductance at 2D interfaces with graphene, which is validated by non-equilibrium Green's function calculations and molecular dynamics simulations for graphene–gold contacts. Our results reveal that while metal–graphene interfaces are transparent for both electrons and phonons, non-covalent graphene interfaces block electronic tunneling beyond two layers but not phonon transport. This suggests that the Wiedemann–Franz law can be experimentally tested by measuring transport across interfaces with varying graphene layers.

关 键 词：electrical and thermal transport 2D interfaces Wiedemann–Franz law theoretical proposal 

分 类 号：O469[理学—凝聚态物理]