The Two-Dimensional S=1 Quantum Heisenberg Antiferromagnet at Finite Temperatures

Preprint

22 September 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9712292

Abstract

The temperature dependence of the correlation length, susceptibilities and the magnetic structure factor of the two-dimensional spin-1 square lattice quantum Heisenberg antiferromagnet are computed by the quantum Monte Carlo loop algorithm (QMC). In the experimentally relevant temperature regime the theoretically predicted asymptotic low temperature behavior is found to be not valid. The QMC results however, agree reasonably well with the experimental measurements of La2NiO4 even without considering anisotropies in the exchange interactions.

Keywords

QUANTUM HEISENBERG ANTIFERROMAGNET
FINITE TEMPERATURES
ANISOTROPIES
MONTE CARLO
ALGORITHM
QMC

All Related Versions

Version 1, 1997-12-25, ArXiv
Version 2, 1998-03-09, ArXiv
Version 3, 1998-09-22, ArXiv
Published version: Journal of the Physics Society Japan, 67 (4), 1130.

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