High pressure synthesis of a new perovskite-type cuprate with doped Cu-O chains

ORAL

Abstract

The discovery of high-temperature superconductivity in cuprates has spurred the search for novel low-dimensional cuprates such as spin-ladder compounds. On the other hand, less attention has been paid for the three-dimensional counterpart, the perovskite-type cuprates ACuO3, presumably because of the difficulty in high-pressure synthesis. In this study, we have succeeded in the high-pressure synthesis of a novel GdFeO3-type perovskite cuprate PrCuO3 with quasi-one-dimensional Cu-O chains showing nearly metallic conductivity. Synchrotron x-ray diffraction and x-ray absorption spectroscopy reveal that the oxidation state can be described as Pr(4-δ)+Cu(2+δ)+O3. The first principles calculations suggest that the formation of the Cu-O chain is caused by the A-B site charge transfer and the cooperative Jahn-Teller distortion of nearly divalent Cu ions. This system offers a unique opportunity to explore novel quantum phases of correlated electrons as the simplest one-dimensional counterpart of the high-temperature superconducting cuprates.

*This work is partly supported by Grant-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Japan (Kakenhi No. 17H01195), JST PRESTO Hyper-nano-space design toward Innovative Functionality (Grant No. JPMJPR1412).

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Presenters

  • Shintaro Ishiwata

    • The University of Tokyo
    • University of Tokyo and JST-PRESTO

Authors

  • Masaharu Ito

    • University of Tokyo

  • Hidefumi Takahashi

    • University of Tokyo

  • Hideaki Sakai

    • Osaka University and JST-PRESTO

  • Jun Fujioka

    • Graduate School of Pure and Applied Sciences, University of Tsukuba
    • University of Tsukuba
    • University of Tokyo and JST-PRESTO

  • Masayuki Ochi

    • Department of Physics, Osaka University
    • Osaka University

  • Shiro Sakai

    • RIKEN
    • Center for Emergent Matter Science, RIKEN
    • University of Tokyo and RIKEN CEMS

  • Ryotaro Arita

    • RIKEN
    • RIKEN Center for Emergent Matter Science
    • Department of Applied Physics and Quantum-Phase Electronics Center, University of Tokyo
    • University of Tokyo
    • University of Tokyo and RIKEN CEMS

  • Hajime Sagayama

    • KEK
    • High Energy Accelerator Research Organization

  • Yuichi Yamasaki

    • NIMS

  • Yuichi Yokoyama

    • University of Tokyo ISSP

  • Hiroki Wadati

    • University of Tokyo ISSP

  • Yoshihiro Kusano

    • Okayama University of Science

  • Yoshinori Tokura

    • RIKEN Center for Emergent Matter Science (CEMS)
    • RIKEN Center for Emergent Matter Science
    • RIKEN CEMS
    • RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan
    • Center for Emergent Matter Science (CEMS), RIKEN
    • Department of Applied Physics and Quantum-Phase Electronics Center, University of Tokyo
    • University of Tokyo
    • University of Tokyo and RIKEN CEMS
    • CEMS, RIKEN
    • Center for Emergent Matter Science, RIKEN
    • Department of Applied Physics, University of Tokyo
    • University of Tokyo and RIKEN-CEMS

  • Shintaro Ishiwata

    • The University of Tokyo
    • University of Tokyo and JST-PRESTO