Please use this identifier to cite or link to this item: https://olympias.lib.uoi.gr/jspui/handle/123456789/16247
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dc.contributor.authorKamaratos, M.en
dc.contributor.authorVlachos, D.en
dc.contributor.authorFoulias, S. D.en
dc.date.accessioned2015-11-24T18:29:17Z-
dc.date.available2015-11-24T18:29:17Z-
dc.identifier.issn0218-625X-
dc.identifier.urihttps://olympias.lib.uoi.gr/jspui/handle/123456789/16247-
dc.rightsDefault Licence-
dc.subjectnickelen
dc.subjectbariumen
dc.subjectadsorptionen
dc.subjectx-ray photoemission spectroscopyen
dc.subjectvalence banden
dc.subjectwork functionen
dc.subjectcore level binding energy shiftsen
dc.subjectbaen
dc.subjectxpsen
dc.subjectphotoemissionen
dc.subjectadsorptionen
dc.subjectlevelen
dc.subjectoxidationen
dc.subjectspectraen
dc.subjectcalciumen
dc.subjectoxidesen
dc.subjectstatesen
dc.titleElectronic properties of barium ultrathin layers on the Ni(110) surfaceen
heal.typejournalArticle-
heal.type.enJournal articleen
heal.type.elΆρθρο Περιοδικούel
heal.identifier.secondary<Go to ISI>://000237301600008-
heal.languageen-
heal.accesscampus-
heal.recordProviderΠανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιώνel
heal.publicationDate2005-
heal.abstractIn this paper, we study the adsorption of Ba on the Ni(110) surface at room temperature. The investigation takes place mainly by soft X-ray photoelectron spectroscopy measurements. At low coverage (<0.5 ML), the Ba adatoms are in a partially ionic state, whereas at higher coverage, the barium overlayer becomes metallic. The nonmetal to metal transition is characterized by a new Ba 4d doublet appearing at higher binding energy. This more bound Ba 4d core state is attributed to initial state changes of the electrostatic potential at the atomic core region, due to changes in the hybridization of the Ba atoms from Ba 5d with Ni 3d, to Ba 5d, 6s and 6p states in the metallic phase. The latter states are more spatially extended than the Ba 5d ones, overlapping with the Ni 3d orbitals in the nonmetal and therefore lead to a reduced potential at the core electrons. A strong effect on the Ba 4d binding energy shifts, due to the surface dipole induced by the adsorbate itself, was observed.en
heal.journalNameSurface Review and Lettersen
heal.journalTypepeer reviewed-
heal.fullTextAvailabilityTRUE-
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)



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