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Frustration-driven C 4 symmetric order in a naturally-heterostructured superconductor Sr2VO3FeAs

Author

Listed:
  • Jong Mok Ok

    (Pohang University of Science and Technology
    Institute for Basic Science)

  • S.-H. Baek

    (IFW Dresden)

  • C. Hoch

    (Max-Planck-Institut für Festkörperforschung)

  • R. K. Kremer

    (Max-Planck-Institut für Festkörperforschung)

  • S. Y. Park

    (Pohang University of Science and Technology)

  • Sungdae Ji

    (Pohang University of Science and Technology
    Pohang University of Science and Technology)

  • B. Büchner

    (IFW Dresden)

  • J.-H. Park

    (Pohang University of Science and Technology
    Pohang University of Science and Technology
    Pohang University of Science and Technology)

  • S. I. Hyun

    (Pohang University of Science and Technology)

  • J. H. Shim

    (Pohang University of Science and Technology)

  • Yunkyu Bang

    (Chonnam National University)

  • E. G. Moon

    (Korea Advanced Institute of Science and Technology)

  • I. I. Mazin

    (Naval Research Laboratory code 6390)

  • Jun Sung Kim

    (Pohang University of Science and Technology
    Institute for Basic Science)

Abstract

A subtle balance between competing interactions in iron-based superconductors (FeSCs) can be tipped by additional interfacial interactions in a heterostructure, often inducing exotic phases with unprecedented properties. Particularly when the proximity-coupled layer is magnetically active, rich phase diagrams are expected in FeSCs, but this has not been explored yet. Here, using high-accuracy 75As and 51V nuclear magnetic resonance measurements, we investigate an electronic phase that emerges in the FeAs layer below T 0 ~ 155 K of Sr2VO3FeAs, a naturally assembled heterostructure of an FeSC and a Mott-insulating vanadium oxide. We find that frustration of the otherwise dominant Fe stripe and V Neel fluctuations via interfacial coupling induces a charge/orbital order in the FeAs layers, without either static magnetism or broken C 4 symmetry, while suppressing the Neel antiferromagnetism in the SrVO3 layers. These findings demonstrate that the magnetic proximity coupling stabilizes a hidden order in FeSCs, which may also apply to other strongly correlated heterostructures.

Suggested Citation

  • Jong Mok Ok & S.-H. Baek & C. Hoch & R. K. Kremer & S. Y. Park & Sungdae Ji & B. Büchner & J.-H. Park & S. I. Hyun & J. H. Shim & Yunkyu Bang & E. G. Moon & I. I. Mazin & Jun Sung Kim, 2017. "Frustration-driven C 4 symmetric order in a naturally-heterostructured superconductor Sr2VO3FeAs," Nature Communications, Nature, vol. 8(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02327-0
    DOI: 10.1038/s41467-017-02327-0
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