title: Surface structure of V_{2}O_{3}(0001) revisited.
abstract: In a recent paper [A. J. Window et al., Phys. Rev. Lett. 107, 016105 (2011)], it was proposed that V_{2}O_{3}(0001) is terminated by the so-called O_{3} termination, a reconstruction with a terminating distorted hexagonal oxygen layer. We show that the surface is terminated by vanadyl (V═O) groups instead. This conclusion is based on quantitative low-energy electron diffraction combined with scanning tunneling microscopy, fast atom scattering, and density functional theory employing the Heyd-Scuseria-Ernzerhof functional. New insights into the subsurface sensitivity of ion beam triangulation show that results previously interpreted in favor of the O_{3} termination are reconcilable with vanadyl termination as well.
authors.affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
authors.forename: Felix E
authors.initials: FE
authors.lastname: Feiten
authors.affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.|Humboldt-Universität zu Berlin, Institut für Physik, Newtonstrasse 15, 12489 Berlin, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Seifert
authors.affiliation: Humboldt-Universität zu Berlin, Institut für Chemie, Unter den Linden 6, 10099 Berlin, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Paier
authors.affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
authors.forename: Helmut
authors.initials: H
authors.lastname: Kuhlenbeck
authors.affiliation: Humboldt-Universität zu Berlin, Institut für Physik, Newtonstrasse 15, 12489 Berlin, Germany.
authors.forename: Helmut
authors.initials: H
authors.lastname: Winter
authors.affiliation: Humboldt-Universität zu Berlin, Institut für Chemie, Unter den Linden 6, 10099 Berlin, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Sauer
authors.affiliation: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
authors.forename: Hans-Joachim
authors.initials: HJ
authors.lastname: Freund