Berlin 2012 – scientific programme
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O: Fachverband Oberflächenphysik
O 43: Clean surfaces III
O 43.7: Talk
Wednesday, March 28, 2012, 12:00–12:15, MA 043
Structure of V2O3 films on Au(111) — •Eric Meyer, Jan Seifert, and Helmut Winter — Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr. 15, 12489 Berlin
In recent studies Window et al. [1] have reported on the surface termination of thin V2O3 films grown on Au(111). Measurements reveal a reconstructed trilayer with O3-termination in accord with DFT-calculations. This is in conflict with a complete monolayer of vanadyl species found by other groups [2].
In this work we present studies on the V2O3 surface via scattering of fast atoms under grazing angles of incidence. The measurements are compared with trajectory computer simulations in which electron emission is incorporated for both structual models.
We find clear evidence for the reconstructed trilayer structure. Excellent agreement between experiment and simulation is found so that we can confirm a O3 termination with slightly modified positions of topmost O atoms compared to [1].
[1] Window et al., Phys. Rev. Lett. 107, 016105 (2011)
[2] Dupuis et al., Surf. Sci. 539, 99 (2003)