Phonon transport in a one-dimensional harmonic chain with long-range interaction and mass disorder

Abstract

Atomic mass and interatomic interaction are the two key quantities that significantly affect the heat conduction carried by phonons. Here, we study the effects of long-range (LR) interatomic interaction and mass-disorder on the phonon transport in a one-dimensional harmonic chain withup to 10^5 atoms. We find that while LR interaction reduces the transmission of low frequency phonons, it enhances the transmission of high frequency phonons by suppressing the localization effects caused by mass disorder. Therefore, long-range interaction is able to boost heat conductance in the high temperature regime or in the large size regime, where the high frequency modes are important.

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• Heat transport and cooling performance in a nanomechanical system with local and non local interactions
• Revealing molecule-internal mechanisms that control phonon heat transport through single-molecule junctions by a genetic algorithm