Electron tunnelling study of the superconducting high-pressure phase of Bi

Abstract
The high-pressure superconducting phase of evaporated Bi films has been studied by electron tunnelling, using Schottky barriers. The values of the transition temperature, energy gap and phonon energies of Bi III are very similar to those for Pb and for amorphous Bi. A comparative discussion of the strong coupling superconductivity in these materials is given.