title: Short-range interactions in Na coadsorption with CO and O on Ni(111).
abstract: The coadsorption of Na with CO and O on Ni(111) is studied by high-resolution electron energy loss spectroscopy. Experimental evidence for a very short-range interaction between Na and coadsorbates is reported, in contrast with recent theoretical predictions overestimating nonlocal alkali-induced effects. Loss spectra show distinct features, as a consequence of different local [CO]:[Na] and [O]:[Na] stoichiometries.
authors.affiliation: Dipartimento di Fisica, Università degli Studi della Calabria via ponte Bucci, 87036 Rende, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Politano
authors.forename: Raffaele G
authors.initials: RG
authors.lastname: Agostino
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Formoso
authors.forename: Gennaro
authors.initials: G
authors.lastname: Chiarello