2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/23081Magnetic diffractive scattering of coherent metastable helium atomic beams from CoO(001) surfaces reveal the presence of an anomalous enhancement in the intensity of the half-order antiferromagnetic diffraction peak over the temperature range of 250-320K. Electronic cluster calculations based on Hartree-Fock states with configuration interactions, together with mean-field and Monte Carlo studies of this system suggest that this behavior is associated with low-lying surface spin excited states.4 pages, 5 figuresStrongly Correlated Electronstext