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Dynamic Atomic Reconstruction: How Fe3O4 Thin Films Evade Polar Catastrophe for Epitaxy

Chang, C. F. and Hu, Z. and Klein, Stefan and Liu, X. H. and Sutarto, R. and Tanaka, A. and Cezar, J. C. and Brookes, N. B. and Lin, H.-J. and Hsieh, H. H. and Chen, C. T. and Rata, A. D. and Tjeng, L.H. (2016) Dynamic Atomic Reconstruction: How Fe3O4 Thin Films Evade Polar Catastrophe for Epitaxy. Physical Review X, 6, 041011. American Physical Society. doi: 10.1103/PhysRevX.6.041011. ISSN 2160-3308.

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Abstract

Polar catastrophe at the interface of oxide materials with strongly correlated electrons has triggered a flurry of new research activities. The expectations are that the design of such advanced interfaces will become a powerful route to engineer devices with novel functionalities. Here, we investigate the initial stages of growth and the electronic structure of the spintronic Fe3O4/MgO(001) interface. Using soft x-ray absorption spectroscopy, we have discovered that the so-called A-sites are ompletely missing in the first Fe3O4 monolayer. This discovery allows us to develop an unexpected but elegant growth principle in which, during deposition, the Fe atoms are constantly on the move to solve the divergent electrostatic potential problem, thereby ensuring epitaxy and stoichiometry at the same time. This growth principle provides a new perspective for the design of interfaces.

Item URL in elib:https://elib.dlr.de/110201/
Document Type:Article
Title:Dynamic Atomic Reconstruction: How Fe3O4 Thin Films Evade Polar Catastrophe for Epitaxy
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Chang, C. F.Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Hu, Z.max-planck-institut für chemische physik fester stoffe, nöthnitzer straße 40, 01187 dresden, germanyUNSPECIFIED
Klein, StefanII. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany; resent address: Institute of Materials Physics in Space, German Aerospace Center, Linder Hohe, 51147 Köln, Germany.UNSPECIFIED
Liu, X. H.Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, GermanyUNSPECIFIED
Sutarto, R.II. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany; Present address: Canadian Light Source, Saskatoon, Saskatchewan S7N 2V3, Canada.UNSPECIFIED
Tanaka, A.Department of Quantum Matter, ADSM, Hiroshima University, Higashi-Hiroshima 739-8530, JapanUNSPECIFIED
Cezar, J. C.European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France; Present address: National Center for Research in Energy and Materials, Brazilian Synchrotron Light Laboratory, C.P. 6192, 13083-970, Campinas, SP, Brazil.UNSPECIFIED
Brookes, N. B.European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, FranceUNSPECIFIED
Lin, H.-J.national synchrotron radiation research center (nsrrc), 101 hsin-ann road, hsinchu 30077, taiwanUNSPECIFIED
Hsieh, H. H.Chung Cheng Institute of Technology, National Defense University, Taoyuan 335, TaiwanUNSPECIFIED
Chen, C. T.national synchrotron radiation research center (nsrrc), 101 hsin-ann road, hsinchu 30077, taiwanUNSPECIFIED
Rata, A. D.Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany; Present address: Institute of Physics, Martin Luther University, Halle-Wittenberg, 06099 Halle, Germany.UNSPECIFIED
Tjeng, L.H.max-planck-institut für chemische physik fester stoffe, nöthnitzer straße 40, 01187 dresden, germanyUNSPECIFIED
Date:18 October 2016
Journal or Publication Title:Physical Review X
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:6
DOI :10.1103/PhysRevX.6.041011
Page Range:041011
Publisher:American Physical Society
ISSN:2160-3308
Status:Published
Keywords:Condensed Matter Physics, Materials Science, Spintronics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Kargl, Dr Florian
Deposited On:05 Jan 2017 08:41
Last Modified:30 May 2019 22:07

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