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Article Dans Une Revue Physical Review Letters Année : 2008

Charging of metal adatoms on ultrathin oxide films: Au and pd on FeO/Pt(111)

L. Giordano
  • Fonction : Auteur
G. Pacchioni
  • Fonction : Auteur
N. Nilius
Emile D. L. Rienks
  • Fonction : Auteur
H.J. Freund
  • Fonction : Auteur

Résumé

We present a combined experimental (STM/scanning tunneling spectroscopy) and theoretical (density functional theory) study on the deposition of Au and Pd metal atoms on FeO/Pt(111) ultrathin films. We show that while the Pd atoms are only slightly oxidized, the Au atoms form positive ions upon deposition, at variance to a charge transfer into the Au atoms as observed for MgO/Ag(100). The modulation of the adsorption properties within the surface Moire cell and the charging induce the formation a self-assembled array of gold adatoms on FeO/Pt(111), whereas Pd atoms are randomly distributed.

Dates et versions

hal-00425172 , version 1 (20-10-2009)

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Citer

L. Giordano, G. Pacchioni, Jacek Goniakowski, N. Nilius, Emile D. L. Rienks, et al.. Charging of metal adatoms on ultrathin oxide films: Au and pd on FeO/Pt(111). Physical Review Letters, 2008, 101 (2), pp.026102. ⟨10.1103/PhysRevLett.101.026102⟩. ⟨hal-00425172⟩
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