Superconducting energy gap in $\mathrm{B}{\mathrm{a}}_{1-\mathrm{x}}{\mathrm{K}}_{\mathrm{x}}\mathrm{Bi}{\mathrm{O}}_3$: Temperature dependence

F. Szabo, P. Samuely, N. L. Bobrov +3

The superconducting energy gap of $\mathrm{B}{\mathrm{a}}_{1-\mathrm{x}}{\mathrm{K}}_{\mathrm{x}}\mathrm{Bi}{\mathrm{O}}_3$ has been measured by tunneling. Despite the fact that the sample was macroscopically single phase with very sharp supercond…