Abstract
Investigations of the Yb–Si(111) and O2–Yb–Si(111) structures are carried out by means of the angle-resolved photoelectron spectroscopy method, and data about distribution of two- and three-valence ions in ytterbium nanofilms are obtained in the case when an adsorbed molecules layer on their surface is not fully formed yet, and Yb2+ → Yb3+ valence transition is not completed. It is shown that distribution of Yb2+ and Yb3+ ions deep into the nanofilms is close to isotropic, and that its spread is 9 or more monolayers. The obtained results indicate that all atoms of the nanofilm participate in formation of the ytterbium 5d band, stimulated by adsorbed molecules, confirming assumptions made in earlier publications.
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