Superconducting and normal state properties of carbon doped and neutron irradiated MgB2

Current research in MgB2 focuses on the effects various types of perturbations have on the superconducting properties of this novel two-gap superconductor. In this article we summarize the effects of carbon doping and neutron irradiation in bulk MgB2. Low levels of carbon doping and light neutron irradiation result in significant enhancements in Hc2. At high fluences, where superconductivity is nearly fully suppressed, superconductivity can be restored through post exposure annealing. However, this results in a change in the interdependencies of the normal state and superconducting properties (ρ0, Tc, Hc2), with little or no enhancement in Hc2.