Author/Authors :
Neudachina، نويسنده , , V.S. and Shatalova، نويسنده , , T.B. and Shtanov، نويسنده , , V.I. and Yashina، نويسنده , , L.V. and Zyubina، نويسنده , , T.S. and Tamm، نويسنده , , M.E. and Kobeleva، نويسنده , , S.P.، نويسنده ,
Abstract :
The interaction between the (1 0 0) 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 108–1013 L. During the oxidation an additional component shifted 1.1 eV towards higher binding energies appears in the Sn 3d spectra. The Te 3d5/2 spectra fitting reveals two additional components with binding energies close to Te0 and Te+4. The dependence of the additional components fraction in both Sn 3d and Te 3d5/2 spectra on the oxygen exposure is semi-logarithmic. On the base of the experimental data two possible mechanisms are proposed.
