Temperature dependent correlation length for the S=1/2 Quantum Heisenberg Antiferromagnet on the square lattice

Details Temperature dependent correlation length for the S=1/2 Quantum Heisenberg Antiferromagnet on the square lattice Temperature dependent correlation length for the S=1/2 Quantum Heisenberg Antiferromagnet on the square lattice

1997-02-14

arxiv.org/abs/cond-mat/9702138v2

Phys.Rev.Lett. 79 (1997) 001583

Physics

Condensed Matter

Statistical Mechanics

Modified with improved data; to appear in Phys. Rev. Lett. as a Comment; latex file and one eps file

Scientific paper

10.1103/PhysRevLett.79.1583

We present an analysis of high precision Monte Carlo data for the two dimensional S=1/2 quantum Heisenberg antiferromagnet up to $\xi = 95.7(3)$ obtained by the continuous time version of the loop algorithm. Our data are in good agreement with a prediction of the recent theory (Phys. Rev. Lett. vol. 77, 3439 (1996)) in very high temperature regime, but they strongly disagree with it in the low temperature regime.

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