Abstract
AbstractWe 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, ω (q), are compared with high‐resolution inelastic neutron scattering performed on La2CuO4. The effects of different band structures and different values of the on‐site Coulomb interaction on the spin wave spectrum are studied. Particular attention is put on the high energy dispersion values ω (π/2, π/2) and ω (0, π).
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