Interpretation of infrared modulation spectroscopy data in graphite by the Slonczewski-Weiss- McClure band model

Recently published thermoreflectance data for graphite in the photon energy range $0.6<\mathrm{}\hslash \omega <1.0\mathrm{}$ eV are shown to be consistent with the Slonczewski-Weiss-McClure band model using commonly accepted values for the band parameters of this model. These data show ${\gamma }_5$ to be positive and provide the first direct experimental determination of this parameter, yielding a value of ${\gamma }_5=0.025\mathrm{}$ eV.