Remarkable reduction of interfacial thermal resistance in nanophononic heterostructures

Kai Ren, Xiangjun Liu, Shuai Chen, Yuan Cheng, Wencheng Tang, Gang Zhang

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37 Citations (Scopus)

Abstract

This work investigates interfacial thermal transport in phononic-mismatched heterostructures that consists of pristine black phosphorene and its phononic crystal. It is found that the presence of the sub-periodic structure results in reduced thermal conductivity in phononic crystals. As opposed to intuitive expectations, a slight temperature jump is observed at the interface of nanophononic heterostructures, which is only about 10% of that at conventional interfaces consisting of dissimilar materials. Consequently, contact thermal conductance in the nanophononic heterostructure is 10−30 times higher than that of mass-mismatched interfaces in a comparative study. Moreover, in contrast to conventional heterostructures achieved by interfacing dissimilar materials, weak temperature dependence is observed in interfacial thermal conductance, and thermal rectification is sharply suppressed. These phenomena are well explained based on lattice dynamic insights. This work not only enhances the understanding of the fundamental physics of phonons transport across interface, but also facilitates the possible spectrum of application ranges from thermoelectrics, thermal management, to thermal cloak.

Original languageEnglish
Article number2004003
Number of pages7
JournalAdvanced Functional Materials
Volume30
Issue number42
DOIs
Publication statusPublished - 15 Oct 2020
Externally publishedYes

Keywords

  • Interfacial thermal resistance
  • lattice dynamics
  • molecular dynamicsimulation
  • thermal conduction

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