XPS and ab initio study of the interaction of PbTe with molecular oxygenстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:he interaction between the (100) surface of SnTe single crystal and molecular oxygen was studied by means of X-ray photoelectron spectroscopy (XPS). Analysis of the obtained spectra shows that the mechanism of surface oxidation does not change in the range of oxygen exposure 10(8)-10(13) L. During the oxidation an additional component shifted 1.1 eV towards higher binding energies appears in the Sn3d spectra. The Te 3d(5/2) spectra fitting reveals two additional components with binding energies close to Te-0 and Te+4. The dependence of the additional components fraction in both Sn 3d and Te 3d(5/2) spectra on the oxygen exposure is semi-logarithmic. On the base of the experimental data two possible mechanisms are proposed. (c) 2005 Elsevier B.V. All rights reserved.