Localization of the Cu111 surface state by single Cu adatoms.
The Cu adatom-induced localization of the two-dimensional Shockley surface state at the Cu(111) surface was identified from experimental and simulated scanning tunneling microscopy spectra. The localization gives rise to a resonance located just below the surface state band edge. The adatom-induced surface state localization is discussed in terms of the existence theorem for bound states in any attractive two-dimensional potential. We also identify adatom-induced resonance states deriving from atomic orbitals in both experimental and simulated spectra.
Olsson
F E
FE
Department of Applied Physics, Chalmers/Göteborg University, S-41296 Göteborg, Sweden.
Persson
M
M
Borisov
A G
AG
Gauyacq
J-P
JP
Lagoute
J
J
Fölsch
S
S