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Electronic structures of nanostructured transition metals on the Au(788) surface
Author(s) -
Fujisawa H.,
Shiraki S.,
Nantoh M.,
Kawai Maki
Publication year - 2005
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.1946
Subject(s) - angle resolved photoemission spectroscopy , transition metal , ferromagnetism , electronic structure , valence (chemistry) , photoemission spectroscopy , condensed matter physics , fermi level , x ray photoelectron spectroscopy , spectral line , chemistry , materials science , physics , nuclear magnetic resonance , electron , catalysis , biochemistry , organic chemistry , quantum mechanics , astronomy
Abstract The electronic structures of nanostructured transition metals (Fe, Co, Ni) grown by step decoration of the Au(788) surface are investigated by normal emission angle‐resolved photoemission spectroscopy (ARPES). As the coverage of the transition metals is increased, the intensity of Au 5d valence bands decreases but the peak positions do not change, suggesting that the mixing between Au 5d and 3d of transition metals is negligibly weak. The coverage dependences of ARPES spectra near the Fermi level ( E F ) for Fe, Co and Ni are discussed and compared with the photoemission results on bulk materials. In the higher coverage regions, we identify the observed 3d peaks near E F as ferromagnetic exchange splitting bands with similar exchange energy to the bulk. In contrast, at lower coverages, the exchange splitting vanishes for Fe and Co and becomes small for Ni. The origins of this behaviour are attributed to atomic volume, structural dimensionality and finite temperature effects. Copyright © 2005 John Wiley & Sons, Ltd.