Coexistence of the Electron Cooper Pair and Antiferromagnetic Short-Range Correlation in Copper Oxide Materials

TL;DR

This paper explores how electron Cooper pairs coexist with antiferromagnetic short-range correlations in copper oxide materials, suggesting magnetic interactions influence the superconducting state.

Contribution

It demonstrates the coexistence of electron pairing and magnetic correlations within the fermion-spin framework, highlighting the magnetic origin of pairing in the t-J model.

Findings

Coexistence of Cooper pairs and magnetic correlations confirmed

Antiferromagnetic correlations persist into the superconducting state

Pure magnetic interactions lead to local, not true, superconducting states

Abstract

Within the fermion-spin theory, the physical properties of the electron pairing state in the copper oxide materials are discussed. According to the common form of the electron Cooper pair, it is shown that there is a coexistence of the electron Cooper pair and magnetic short-range correlation, and hence the antiferromagnetic short-range correlation can persist into the superconducting state. Moreover, the mean-field results indicate that the electron pairing state originating from the pure magnetic interaction in the two-dimensional t-J model is the local state, and then does not reveal the true superconducting ground-state.