Transition metals and the Frohlich mechanism for superconductivity

The properties of screened plasma oscillations of the d band, which Frohlich first suggested could lead to superconductivity, are investigated. Specific-heat anomalies in the normal and superconducting state, normal-state resistivities, pressure-induced and pressure-dependent superconductivity, Mossbauer-effect studies, lattice transformations, and the occurrence of superconductivity in transition metals are compared with the theory. These diverse properties indicate that the Frohlich mechanism is operative in high-T-c transition elements and constitutes a new mechanism for superconductivity.