Sublattice Magnetization and Néel Transition in the 2D Quantum Heisenberg Antiferromagnet

Details Sublattice Magnetization and Néel Transition in the 2D Quantum Heisenberg Antiferromagnet Sublattice Magnetization and Néel Transition in the 2D Quantum Heisenberg Antiferromagnet

2000-03-02

arxiv.org/abs/cond-mat/0003030v1

Physica C341 (2000) 201

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 2 figures, uses espcrc2.sty, Proceedings of the M2S-HTSC conference

Scientific paper

We present an analytic expression for the finite temperature sublattice magnetization, at the Josephson scale, in two dimensional quantum antiferromagnets with short range N\'eel order. Our expression is able to reproduce both the qualitative behaviour of the phase diagram $M(T)/M_{0}$ and the experimental values of the N\'eel temperature $T_{N}$ for either doped YBa$_{2}$Cu$_{3}$O$_{6.15}$ and stoichiometric La$_{2}$CuO$_{4}$.

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