On the Mechanism of High-T_c Superconductivity

Abstract

A possible mechanism of superconductivity in oxide compounds is studied on the basis that hole carriers mainly occupy oxygen p-orbits. It is shown that oxygen holes may form singlet pairs with neighboring copper holes. It is proposed that mutually attractive interaction of the singlet pairs may lead to superconductivity. Results of quantum simulations show enhancement of pairing between two oxygen holes on a two-dimensional square lattice.