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

López, Roso Redondo Jesús R.; Lazar, P.; Procházka, P.; Průša, S.; Mallada Faes, Benjamin Jose; Cahlík, Aleš; Lachnitt, J.; Berger, Jan; Šmíd, B.; Kormos, L.; Jelínek, Pavel; Čechal, J.; Švec, Martin

doi:https://dx.doi.org/10.1021/acs.jpcc.9b00244

Number of the records: 1

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

1.

SYSNO ASEP	0517446
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Identification 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 authors	13
Source Title	Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447 Roč. 123, č. 23 (2019), s. 14312-14318
Number of pages	7 s.
Language	eng - English
Country	US - United States
Keywords	oxide-films ; in-situ ; iron ; oxygen ; atmosphere ; catalysis ; growth
Subject RIV	BM - Solid Matter Physics ; Magnetism
OECD category	Condensed matter physics (including formerly solid state physics, supercond.)
R&D Projects	GJ17-24210Y GA ČR - Czech Science Foundation (CSF)
Method of publishing	Limited access
Institutional support	FZU-D - RVO:68378271
UT WOS	000471834000024
EID SCOPUS	85067447476
DOI	10.1021/acs.jpcc.9b00244
Annotation	Iron 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.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2020
Electronic address	https://doi.org/10.1021/acs.jpcc.9b00244

Number of the records: 1