Selectivity of auger decays to the local surface environment.
The line shape of the Auger decay of adatoms is studied by a joint theoretical and experimental effort, the former within a DFT framework, and the latter with synchrotron radiation measurements. We investigate the KL(2,3)V Auger deexcitation of Na on Al(111), a system with different adsorption geometries. In particular, we study the (sqrt[3]xsqrt[3])R30 degrees phase at 1/3 ML (monolayer) and the more complex (2 x 2) structure at 1/2 ML coverage. From the comparison between theory and experiment, we unambiguously determine features that allow for the determination of the adsorption environment from the adatom Auger spectrum.
Trioni
M I
MI
Istituto Nazionale per la Fisica della Materia, UdR Milano Bicocca, via Cozzi 53, I-20125 Milano, Italy.
Caravati
S
S
Brivio
G P
GP
Floreano
L
L
Bruno
F
F
Morgante
A
A