Theory of a quasi-one-dimensional band-conductor

Abstract Following the very recent experiments on the Pt-complex based one- dimensional (1− d ) conductors we present a microscopic theory of a 1− d band conductor which explicitly shows how the giant Kohn anomaly in a higher temperature metallic state can be the precursor of a second-order phase transition to a lower-temperature insulating phase, the electronic energy gap of which is of the BCS type.