  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.
