Using Targeted Phonon Excitation to Modulate Thermal Conductivity of Boron Nitride

TL;DR

This paper demonstrates that targeted phonon excitation can significantly modulate the thermal conductivity of hexagonal boron nitride, with increases up to 30.1% and decreases up to 59.8%, offering a new approach for thermal management in 2D materials.

Contribution

It introduces a novel phonon excitation strategy to control thermal conductivity in hBN, validated through Boltzmann transport and two-temperature models.

Findings

Thermal conductivity of hBN can be increased by 30.1%.

Thermal conductivity of hBN can be decreased by 59.8%.

The strategy is reliable and broadly applicable.

Abstract

Recent advancements in thermal conductivity modulating strategies have shown promising enhancements to the thermal management capabilities of two-dimensional materials. In this article, both iterative Boltzmann transport equation solution and two-temperature model were employed to investigate the efficacy of targeted phonon excitation applied to hexagonal boron nitride. The results indicate significant modifications to hBN's thermal conductivity, achieving increases of up to 30.1% as well as decreases of up to 59.8%. These findings validate the reliability of the strategy, expand its scope of applicability, and establish it as a powerful tool for tailoring thermal properties across a wider range of fields.