Electronic structure of SnO2([formula omitted])-4×1 and sputtered SnO2([formula omitted]) revealed by resonant photoemission

• Published in: Surface science Vol. 499; no. 1; pp. 85 - 93
• Main Authors: Sinner-Hettenbach, M., Göthelid, M., Weiß, T., Barsan, N., Weimar, U., von Schenck, H., Giovanelli, L., Le Lay, G.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 20.02.2002
• Subjects: Low energy electron diffraction (LEED); Low index single crystal surfaces; Surface defects; Surface electronic phenomena (work function, surface potential, surface states, etc.); Synchrotron radiation photoelectron spectroscopy; Tin oxides; Surface electronic phenomena (work function, surface potential, surface states, etc.); Tin oxides; Low energy electron diffraction (LEED); Synchrotron radiation photoelectron spectroscopy; Low index single crystal surfaces; Surface defects
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/S0039-6028(01)01801-5

The surface properties of SnO2(110)-4×1 and sputtered SnO2(110) were studied comparatively by resonant photoemission of the valence band states in a photon energy range of 60–130 eV. Resonating energetic levels could be observed on the 4×1 reconstructed surface and the resonance behavior could be switched off by sputter treatment. Additionally, the Sn4d core-levels were recorded at two photon energies in order to allow a statement about the surface's stoichiometry. A tentative explanation of the observed resonance and of the discrepancy between ordered and sputtered surface is given with regard to recent STM results on similar prepared surfaces.