Hybridisation and hopping in the binding of Zr and Mo

A comprehensive and through analysis of binding energy, comprising of terms due to free electron gas, core, d - bands and band structure components, is carried out for the complex metals which show superconducting properties at low temperature. The valence dependent band structure energy expressed in real nd fourier space leads to oppositely directed hybridisation. In real space the hopping of electrons, from d - bands to s - bands, gives rise to altracitve band structure energy, while the band structure energy in fourier space owes its altractive character to the hopping process from s - bands to d-bands. The total biding energy computed for the metals agrees satisfactorily with experimental data.