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.
@article{arxiv.2209.09694,
title = {Modulating Thermal Conductivity via Targeted Phonon Excitation},
author = {Xiao Wan and Dongkai Pan and Jing-Tao Lü and Sebastian Volz and Lifa Zhang and Qing Hao and Yangjun Qin and Zhicheng Zong and Nuo Yang},
journal= {arXiv preprint arXiv:2209.09694},
year = {2023}
}