On the behavior of a Heisenberg antiferromagnet at very low temperatures

Details On the behavior of a Heisenberg antiferromagnet at very low temperatures On the behavior of a Heisenberg antiferromagnet at very low temperatures

1998-02-26

arxiv.org/abs/cond-mat/9802291v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, RevTex

Scientific paper

We present an analytical result for the ratio of the physical correlation length in a 2D Heisenberg antiferromagnet on a square lattice, and the one which is actually computed in numerical simulations. This last correlation length is deduced from the second moment of the structure factor at the antiferromagnetic momentum Q. We show that the ratio is very close to one in agreement with previously obtained numerical result of the 1/N expansion.

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