Magnetic properties of the doped two-dimensional antiferromagnet

TL;DR

This paper models the magnetic properties of doped two-dimensional antiferromagnets, specifically cuprate high-Tc superconductors, using the t-J model to explain experimental observations of spin correlations and susceptibilities.

Contribution

It provides a self-consistent theoretical framework that reproduces various experimental magnetic properties of cuprates based on the t-J model.

Findings

Reproduces the variation of spin correlation length with hole doping.

Explains the temperature dependence of spin susceptibility.

Connects the nonmonotonic temperature behavior of the spin-lattice relaxation rate to competing effects.

Abstract

The variety of the normal-state magnetic properties of cuprate high-Tc superconductors is interpreted based on the self-consistent solution of the self-energy equations for the two-dimensional t-J model. The observed variations of the spin correlation length with the hole concentration x, of the spin susceptibility with x and temperature T and the scaling of the static uniform susceptibility are well reproduced by the calculated results. The nonmonotonic temperature dependence of the Cu spin-lattice relaxation rate is connected with two competing tendencies in the low-frequency susceptibility: its temperature decrease due to the increasing spin gap and the growth of the susceptibility in this frequency region with the temperature broadening of the maximum in the susceptibility.