By comparison of measured and ab initio calculated surface optical spectra we demonstrate that two main oxidation processes initially occur after dissociation of oxygen molecules, forming in both cases Si–O–Si entities: (i) breaking of Si dimers by incorporation of oxygen atoms; (ii) incorporation into the silicon backbonds. The kinetics up to half-monolayer coverage is determined, and explained in terms of Langmuir-like adsorption mechanisms with different probabilities.

All-optical determination of initial oxidation of Si(100) and its kinetics / N. Witkowski, K. Gaál-Nagy, F. Fuchs, O. Pluchery, A. Incze, F. Bechstedt, Y. Borensztein1, G. Onida, R. Del Sole. - In: THE EUROPEAN PHYSICAL JOURNAL. B, CONDENSED MATTER PHYSICS. - ISSN 1434-6028. - 66:4(2008), pp. 427-431.

All-optical determination of initial oxidation of Si(100) and its kinetics

K. Gaál-Nagy
Secondo
;
G. Onida
Penultimo
;
2008

Abstract

By comparison of measured and ab initio calculated surface optical spectra we demonstrate that two main oxidation processes initially occur after dissociation of oxygen molecules, forming in both cases Si–O–Si entities: (i) breaking of Si dimers by incorporation of oxygen atoms; (ii) incorporation into the silicon backbonds. The kinetics up to half-monolayer coverage is determined, and explained in terms of Langmuir-like adsorption mechanisms with different probabilities.
optical properties ; surface states ; band structure ; electron density of states ; adsorption kinetics
Settore FIS/03 - Fisica della Materia
2008
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/58318
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