Spin waves in La_2CuO_4: band structure and correlation effects
Strongly Correlated Electrons
2015-06-24 v1
Abstract
We calculate the antiferromagnetic spin wave dispersion in the half-filled (electronic density n=1) Hubbard model for a two-dimensional square lattice, using the random phase approximation (RPA) in a broken symmetry (spin density wave) ground state. Our results for the spin wave dispersion, \omega(\vec q), are compared with high-resolution inelastic neutron scattering performed on La_2CuO$_4. The effects of different band structures and different values of the on-site Coulomb interaction on the spin wave spectrum is studied. Particular attention is put on the high energy dispersion values \omega(\pi/2,\pi/2) and \omega(0,\pi).
Cite
@article{arxiv.cond-mat/0303409,
title = {Spin waves in La_2CuO_4: band structure and correlation effects},
author = {N. M. R. Peres and M. A. N. Araujo},
journal= {arXiv preprint arXiv:cond-mat/0303409},
year = {2015}
}
Comments
4 pages, 2 figures