A Possible Pairing Mechanism for High-TcSuperconductivity

Abstract

We propose a probable pairing mechanism for high- T c superconductors. The strong correlation between intra-atomic Cu–d holes, U , is treated exactly. We assume holes introduced by doping occupy O–p π as well as O–p σ orbits, and p π holes become itinerant. Strong intra-atomic correlation V , between p π - and p σ -holes, and the Hubbard U can lead to an attractive force between O–p π itinerant holes.