Modulating Thermal Conductivity via Targeted Phonon Excitation

TL;DR

This paper introduces a quantum approach to modulate thermal conductivity by selectively exciting phonons, demonstrating significant tunability in graphene and nanoribbons through computational methods, advancing quantum heat conduction control.

Contribution

The study presents a novel quantum strategy for modulating thermal conductivity by targeted phonon excitation, supported by ab initio and molecular dynamics simulations.

Findings

Thermal conductivity of graphene can be tuned from 1559 W/m-K to 4093 W/m-K.

The approach is effective for graphene nanoribbons.

Results are obtained through ab initio calculations and molecular dynamics simulations.

Abstract

Thermal conductivity is a critical material property in numerous applications, such as those related to thermoelectric devices and heat dissipation. Effectively modulating thermal conductivity has become a great concern in the field of heat conduction. In this study, a quantum strategy is proposed to modulate thermal conductivity by exciting targeted phonons. The results show that the thermal conductivity of graphene can be tailored in the range of 1559 W/m-K (49%) to 4093 W/m-K (128%), compared with the intrinsic value of 3189 W/m-K. A similar trend is also observed for graphene nanoribbons. The results are obtained through both ab initio calculations and molecular dynamics simulations. This brand-new quantum strategy to modulate thermal conductivity paves a way for quantum heat conduction.