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Identification of two-dimensional FeO.sub.2./sub. termination of bulk hematite alpha-Fe.sub.2./sub.O.sub.3./sub.(0001) surface

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    SYSNO ASEP0517446
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleIdentification of two-dimensional FeO2 termination of bulk hematite alpha-Fe2O3(0001) surface
    Author(s) López, Roso Redondo Jesús R. (FZU-D) ORCID
    Lazar, P. (CZ)
    Procházka, P. (CZ)
    Průša, S. (CZ)
    Mallada Faes, Benjamin Jose (FZU-D) ORCID, RID
    Cahlík, Aleš (FZU-D)
    Lachnitt, J. (CZ)
    Berger, Jan (FZU-D) RID
    Šmíd, B. (CZ)
    Kormos, L. (CZ)
    Jelínek, Pavel (FZU-D) RID, ORCID
    Čechal, J. (CZ)
    Švec, Martin (FZU-D) RID, ORCID
    Number of authors13
    Source TitleJournal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
    Roč. 123, č. 23 (2019), s. 14312-14318
    Number of pages7 s.
    Languageeng - English
    CountryUS - United States
    Keywordsoxide-films ; in-situ ; iron ; oxygen ; atmosphere ; catalysis ; growth
    Subject RIVBM - Solid Matter Physics ; Magnetism
    OECD categoryCondensed matter physics (including formerly solid state physics, supercond.)
    R&D ProjectsGJ17-24210Y GA ČR - Czech Science Foundation (CSF)
    Method of publishingLimited access
    Institutional supportFZU-D - RVO:68378271
    UT WOS000471834000024
    EID SCOPUS85067447476
    DOI10.1021/acs.jpcc.9b00244
    AnnotationIron oxides are among the most abundant compounds on Earth and have been exploited and researched extensively. Knowing the atomic structure of their surfaces is essential for the understanding and control of their catalytic properties, electronic character, and spin arrangement. By the combination of atomically resolved microscopy, electron diffraction, and surface-sensitive spectroscopies, we examine the oxygen-rich superstructure grown on an alpha-Fe2O3 (0001) hematite surface and reveal a continuous two-dimensional layer of iron dioxide, structurally analogous to transition metal dichalcogenides. Using total-energy density functional simulation to optimize an atomic model of the superstructure, we identify it as antiferromagnetic and conductive 1T-FeO2 attached on half-metal terminated bulk. These results open the way to the identification of epitaxial 2D layers on other similar metal-oxide surfaces and to a better understanding of their catalytic activity.
    WorkplaceInstitute of Physics
    ContactKristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
    Year of Publishing2020
    Electronic addresshttps://doi.org/10.1021/acs.jpcc.9b00244
Number of the records: 1  

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