Extremely high thermal conductivity of graphene: Prospects for thermal management applications in nanoelectronic circuits

The authors reported on investigation of the thermal conductivity of graphene suspended across trenches in $Si∕SiO2$ wafer. The measurements were performed using a noncontact technique based on micro-Raman spectroscopy. The amount of power dissipated in graphene and corresponding temperature rise were determined from the spectral position and integrated intensity of graphene’s $G$ mode. The extremely high thermal conductivity in the range of $∼3080–5150W∕mK$ and phonon mean free path of $∼775nm$ near room temperature were extracted for a set of graphene flakes. The obtained results suggest graphene’s applications as thermal management material in future nanoelectronic circuits.