Eur. Phys. J. B 32, 27-33 (2003)
https://doi.org/10.1140/epjb/e2003-00070-2

A theoretical analysis of the magnetic properties of La₂CuO₄

Dipartimento di Fisica “E.R. Caianiello” - Unità di ricerca INFM di Salerno, Università degli Studi di Salerno, 84081 Baronissi (SA), Italy

Corresponding author: ^a avella@sa.infn.it

Received: 29 July 2002
Revised: 2 January 2003
Published online: 14 March 2003

Abstract

The magnetic properties of the La₂CuO₄ are analyzed by means of the paramagnetic solution of the Hubbard model within the composite operator method. The experimental findings of the inelastic neutron magnetic scattering [R. Coldea et al., Phys. Rev. Lett. 86, 5377 (2001)] for the spin spectrum, the spin-wave intensity and the behavior of the dispersion at the zone boundary are well described by our results although the difference in phase. The Hubbard model emerges has a minimal model capable to describe the anomalous magnetic behavior of such a strongly correlated material.