Spin Susceptibility in High - TC Superconductivity

Abstract

Spin- current loop fluctuations is proposed as the mechanism of holes pairing in high temperature superconductors using the assumption of the coexistence of short-ranged antiferromagnetism with superconductivity and the Anderson’s superexchange theory. The spin-spin correlation function is calculated using the Kubo-Mori relaxation function and the magnetic susceptibility equation is derived in terms of force correlation. Also a Bardeen –Cooper-Schrieffer (BCS) type of equation is solved for the transition temperature (Tc).

KEY WORDS: Superconductivity, cuprates, superexchange, susceptibility.