Probing Interfacial Electronic Structures in Atomic Layer LaMnO3 and SrTiO3 Superlattices

Authors

  • Amish B. Shah,

    1. Department of Materials Science and Engineering and Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois 61801, USA
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  • Quentin M. Ramasse,

    1. National Center for Electron Microscopy Lawrence-Berkeley National Laboratory Berkeley, CA 94720 USA
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  • Xiaofang Zhai,

    1. Department of Physics and Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois, 61801, USA
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  • Jian Guo Wen,

    1. Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois, 61801, USA
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  • Steve J. May,

    1. Materials Science Division and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
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  • Ivan Petrov,

    1. Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois, 61801, USA
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  • Anand Bhattacharya,

    1. Materials Science Division and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
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  • Peter Abbamonte,

    1. Department of Physics and Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois, 61801, USA
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  • James N. Eckstein,

    1. Department of Physics and Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois, 61801, USA
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  • Jian-Min Zuo

    Corresponding author
    1. Department of Materials Science and Engineering and Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois 61801, USA
    • Department of Materials Science and Engineering and Fredrick Seitz Materials Research Laboratory University of Illinois at Urbana-Champaign Urbana, Illinois 61801, USA.
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Abstract

original image

The interfacial electronic structure characterization of a (LaMnO3)/(SrTiO3) superlattice based on scanning transmission electron microscopy and electron energy loss spectroscopy. Evidence of interfacial band alignment and electron transfer are presented based on the observation of O K edge of individual transition metal and oxygen atomic columns. Electron probe aberration correction was essential for the high spatial resolution mapping of interfacial electronic states.

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