Comment on: "Band Filling and Interband Scattering Effects in MgB2: Carbon versus Aluminium Doping"

P. Samuely, P. Szabo, P. C. Canfield +1

In a recent Physical Review Letter Kortus et al. claim that the observed decrease of $T_c$ in Al and C doped MgB${}_2$ samples is mainly due to the band filling by the electron dopin…