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On the gas adsorption effect upon electronic structure of ferromagnetic Co(0 0 0 1)

✍ Scribed by Štěpán Pick; Hugues Dreyssé

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
113 KB
Volume
540
Category
Article
ISSN
0039-6028

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✦ Synopsis

Effect of C, N or O adsorption on ferromagnetic Co(0 0 0 1) surface on evolution of important electronic features is studied within the local-density functional scheme. At high oxygen or carbon coverage, the spin asymmetry of Co(3d) states at the Fermi level can be reversed; for oxygen, however, the effect is not stable with respect to geometry variation and might correspond to non-equilibrium adatom positions. The concept of exchange splitting for non-homogeneous systems is poorly defined and its presence for well distinguished peaks in the local density of adatom 2p states is expected especially for oxygen. The calculations find, nevertheless, a simple and accurate relation between the spinsplitting of the centre of gravity of 2p electronic sates and value of the magnetic moment induced on adatoms.

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