title: High-resolution electron energy loss spectroscopy study of O-Cu(410).
abstract: We have investigated oxygen adsorption on Cu(410) by high-resolution electron energy loss spectroscopy, dosing O2 with a supersonic molecular beam at different surface temperatures and for different angles of incidence and beam energies or by backfilling. In the investigated crystal temperature range (127 < T < 570 K), adsorption is always dissociative. Depending on T, impact energy, and angle of incidence, the oxygen atoms end up in different adsorption configurations, characterized by different vibrational signatures. In particular, at grazing incidence when only the step edge is exposed to O2, the adatoms end up initially preferentially at the step edge. An ordered overlayer forms at half monolayer coverage when the adsorbate is mobile. Oxide patches develop eventually for large exposures performed by backfilling and at high crystal temperature.
authors.affiliation: Dipartimento di Fisica, Università di Genova and CNISM Unità di Genova, Via Dodecaneso 33, 16146 Genova, Italy. vattuone@fisica.unige.it
authors.forename: Luca
authors.initials: L
authors.lastname: Vattuone
authors.forename: Letizia
authors.initials: L
authors.lastname: Savio
authors.forename: Andrea
authors.initials: A
authors.lastname: Gerbi
authors.forename: Michio
authors.initials: M
authors.lastname: Okada
authors.forename: Kousuke
authors.initials: K
authors.lastname: Moritani
authors.forename: Mario
authors.initials: M
authors.lastname: Rocca