Critical temperature and the transition from quantum to classical order parameter fluctuations in the three-dimensional Heisenberg antiferromagnet

Preprint

21 April 1998

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9804234

Abstract

We present results of extensive quantum Monte Carlo simulations of the three-dimensional (3D) S=1/2 Heisenberg antiferromagnet. Finite-size scaling of the spin stiffness and the sublattice magnetization gives the critical temperature Tc/J = 0.946 +/- 0.001. The critical behavior is consistent with the classical 3D Heisenberg universality class, as expected. We discuss the general nature of the transition from quantum mechanical to classical (thermal) order parameter fluctuations at a continuous Tc > 0 phase transition.

Keywords

ANTIFERROMAGNET
CLASSICAL ORDER
CRITICAL TEMPERATURE
HEISENBERG
MECHANICAL TO CLASSICAL
MONTE CARLO SIMULATIONS
ORDER PARAMETER FLUCTUATIONS
PARAMETER FLUCTUATIONS
PHASE TRANSITION
TRANSITION FROM QUANTUM

All Related Versions

Version 1, 1998-04-21, ArXiv
Published version: Physical Review Letters, 80 (23), 5196.

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