Probing and tuning inelastic phonon conductance across finite-thickness interface

Abstract

Phonon transmission across an interface between dissimilar crystalline solids is calculated using molecular dynamics simulations with interatomic force constants obtained from first principles. The results reveal that although inelastic phonon-transmission right at the geometrical interface can become far greater than the elastic one, its contribution to thermal boundary conductance (TBC) is severely limited by the transition regions, where local phonon states at the interface recover the bulk state over a finite thickness. This suggests TBC can be increased by enhancing phonon equilibration in the transition region for instance by phonon scattering, which is demonstrated by increasing the lattice anharmonicity.

References in corpus (2)

• Role of anharmonic phonon scattering in the spectrally decomposed thermal conductance at planar interfaces
• Microscopic mechanism of low thermal conductivity in lead-telluride

Cited by in corpus (9)

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• A Modified Theoretical Model to Predict the Thermal Interface Conductance Considering Interface Roughness
• On the actual spatial resolution of Brillouin Imaging
• Effects of bulk and interfacial anharmonicity on thermal conductance at solid/solid interfaces
• Two-Path Phonon-Interference Resonance Induces a Stop Band in Silicon Crystal Matrix by Embedded Nanoparticles Array
• Understanding Phonon Transport Properties Using Classical Molecular Dynamics Simulations
• Tunable Thermal Energy Transport across Diamond Membranes and Diamond-Si Interfaces by Nanoscale Graphoepitaxy