Exchange-bond structure and magnetization-step spectra of a diluted Heisenberg antiferromagnet on the square lattice: Lopsided two-exchange models

TL;DR

This paper presents theoretical analysis of magnetization and susceptibility in a diluted Heisenberg antiferromagnet on a square lattice, focusing on lopsided two-exchange models with small secondary exchange constants.

Contribution

It introduces a method to analyze magnetization spectra in lopsided two-exchange models and provides cluster statistics for clusters up to 5 spins.

Findings

Cluster statistics for clusters with up to 5 spins

A procedure to estimate contributions from larger clusters

Theoretical magnetization and susceptibility results

Abstract

Theoretycal results on the magnetization and susceptibility of a Heisenberg diluted antiferromagnet in the square lattice are given. The models considered have two exchange constants (J1-J2 and J1-J3) of which the second is much smaller than the first (lopsided models). Cluster statistics for clusters with up to 5 spins is given. A procedure to account for the contribution to the magnetization of clusters with more than 5 spins is described.