The quantum Heisenberg antiferromagnet on the square lattice
A.Cuccoli, V.Tognetti, P. Verrucchi, R.Vaia
TL;DR
This paper applies a semiclassical quantum statistical method to analyze the thermodynamic properties of the quantum Heisenberg antiferromagnet on a square lattice, achieving good agreement with experimental data.
Contribution
It introduces the pure-quantum self-consistent harmonic approximation to study the QHAF, providing a new approach for analyzing its thermodynamics.
Findings
Results match experimental data for various properties.
Method effectively captures quantum effects in the QHAF.
Applicable to different spin values.
Abstract
The pure-quantum self-consistent harmonic approximation, a semiclassical method based on the path-integral formulation of quantum statistical mechanics, is applied to the study of the thermodynamic behaviour of the quantum Heisenberg antiferromagnet on the square lattice (QHAF). Results for various properties are obtained for different values of the spin and successfully compared with experimental data.
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