Retention of Two-Band Superconductivity in Highly Carbon-Doped MgB2

H. Schmidt, K. E. Gray, D. G. Hinks +4

Tunneling data on MgB_{1.8}C_{0.2} show a reduction in the energy gap of the pi-bands by a factor of two from undoped MgB2 that is consistent with the Tc reduction, but inconsisten…