Hydrogen-induced degradation of ${\mathit{T}}_{\mathit{c}}$ in Zr-Ni and Zr-Cu metallic glasses

We have studied the effect of hydrogen doping of Zr-3d metallic glasses on the superconducting transition temperature ${\mathit{T}}_{\mathit{c}}$. It is shown that the degradation of ${\mathit{T}}_{\mathit{c}}$ is well accounted for by Anderson localization in highly disordered systems.