RVB Contribution to Superconductivity in MgB2

We view MgB2 as electronically equivalent to (non-staggered) graphite (B − layer) that has undergone a zero gap semiconductor to a superconductor phase transition by a large c-axis (chemical) pressure due to Mg layers. Further, like the pπ bonded planar organic molecules, graphite is an old resonating valence bond (RVB) system. The RVB’s are the ‘preexisting cooper pairs’ in the ‘parental’ zero gap semiconducting B− (graphite) sheets that manifests themselves as a superconducting ground state of the transformed metal. Some consequences are pointed out.