Contest between surface resonances and surface states at 3d ferromagnets
Physikalisches Institut, Westfälische Wilhelms-Universität
Münster Wilhelm-Klemm-Str. 10,
D-48149 Münster, Germany
Accepted: 3 June 2002
The surface electronic structure of band ferromagnets in the vicinity of the Fermi level is strongly influenced by the magnetic d bands. A comparative study of the closed-packed surfaces of Ni, Co, and Fe shows that surface resonances dominate over surface states with increasing d-band influence. Our theoretical analysis distinguishes between surface states and resonances thereby providing a systematics of surface-related spectral features at ferromagnets. This solves the long-standing “surface-state puzzle” in the literature of sometimes contradicting (inverse) photoemission results.
PACS: 73.20.-r – Electron states at surfaces and interfaces / 79.60.-i – Photoemission and photoelectron spectra / 75.70.Rf – Surface magnetism
© EDP Sciences, 2002