Thermal conductivity of graphene in Corbino membrane geometry

TL;DR

This study measures the thermal conductivity of a large graphene membrane using Raman scattering, finding a value around 600 W/m·K, confirming graphene's excellent heat conduction properties.

Contribution

The paper introduces a novel Raman-based method to measure thermal conductivity in graphene membranes with Corbino geometry.

Findings

Thermal conductivity of graphene is approximately 600 W/m·K.

The measured value is lower than previous reports but confirms high thermal conduction.

Raman scattering effectively probes local thermal properties in graphene.

Abstract

Local laser excitation and temperature readout from the intensity ratio of Stokes to anti-Stokes Raman scattering signals are employed to study the thermal properties of a large graphene membrane. The concluded value of the heat conductivity coefficient \kappa ~ 600 W/m \cdot K is smaller than previously reported but still validates the conclusion that graphene is a very good thermal conductor.