"Probing high-energy electronic excitations in NiO using inelastic neutron scattering"

Young-June Kim: A. P. Sorini, C. Stock, T. G. Perring, J. van den Brink, T. P. Devereaux ; Phys. Rev. B, 08/29/11.

Additional Authors: A. P. Sorini, C. Stock, T. G. Perring, J. van den Brink, T. P. Devereaux

Abstract:

High-energy local multiplet excitations of the d electrons are revealed in our inelastic neutron scattering measurements on the prototype magnetic insulator NiO. These become allowed by the presence of both nonzero crystal field and spin-orbit coupling. The observed excitations are consistent with optical, x-ray, and EELS measurements of d-d excitations. This experiment serves as a proof of principle that high-energy neutron spectroscopy is a reliable and useful technique for probing electronic excitations in systems with significant crystal-field and spin-orbit interactions.