Surface States of Cobalt Nanoislands on Cu(111)
2003
The electronic structure of thin Co nanoislands on Cu(lll) has been investigated below and above the Fermi level (E F ) by scanning tunneling spectroscopy at low temperature. Two surface related electronic states are found: a strong localized peak 0.31 eV below E F and a mainly unoccupied dispersive state, giving rise to quantum interference patterns of standing electron waves on the Co surface. Ab initio calculations reveal that the electronic states are spin polarized, originating from d 3 z 2 - r 2-minority and sp-majority bands, respectively.
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