RVB Contribution to Superconductivity in MgB₂
Baskaran, G.
Original · EN
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 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.
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