Hole-hole superconducting pairing in the t-J model induced by spin-wave exchange

TL;DR

This paper investigates hole pairing mechanisms in the t-J model, emphasizing spin-wave exchange and d-wave symmetry, predicting a critical temperature around 100 K at certain doping levels.

Contribution

It provides a numerical analysis of hole pairing via spin-wave exchange in the t-J model, including contact interactions, and explores the dependence on doping and temperature.

Findings

Strong d-wave pairing observed

Critical temperature around 100 K at delta=0.2-0.3

Pairing persists with contact interactions considered

Abstract

We study numerically the hole pairing induced by spin-wave exchange. The contact hole-hole interaction is taken into account as well. It is assumed that antiferromagnetic order is preserved at all scales relevant to pairing. The strongest pairing is obtained for the d-wave symmetry of the gap. Dependence of the value of the gap on hole concentration and temperature is presented. For the critical temperature we obtain Tc about 100 K at the hole concentration delta = 0.2-0.3.