Current-controlled switching of diamagnetism in Ca<sub>3</sub>(Ru<sub>1-<i>x</i></sub>Ti<sub><i>x</i></sub>)<sub>2</sub>O<sub>7</sub>

ORAL

Abstract

It was recently shown that a strong Landau diamagnetism may emerge in strongly correlated electron systems (SCES) under nonequilibrium steady state (NESS) conditions. However, due to high resistivity of the insulating state, in situ sign-switching of magnetism was not possible in the previous study. Here, we demonstrate that DC current can trigger in situ switching between the impurity-induced Mott insulating state and diamagnetic semimetallic state of the bilayered ruthenate Ca3Ru2O7. By performing simultaneous magnetic and resistive measurements, we map out the temperature vs current-density phase diagram in the NESS of this material. The present results open up the possibility of creating novel electronic states in a variety of SCES by NESS conditions under DC current.

*This work was supported by JSPS Grant-in-Aids KAKENHI
Nos. 26247060, 15H05852 and 17H06136.

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Presenters

  • Yoshiteru Maeno

    • Department of Physics, Kyoto University
    • Dept. of Physics, Kyoto University
    • Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Japan
    • Kyoto University
    • Department of Physics, Graduate School of Science, Kyoto University
    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan
    • Department of Physics, Kyoto University, Japan

Authors

  • Yoshiteru Maeno

    • Department of Physics, Kyoto University
    • Dept. of Physics, Kyoto University
    • Department of Physics, Graduate School of Science, Kyoto University, Kyoto, Japan
    • Kyoto University
    • Department of Physics, Graduate School of Science, Kyoto University
    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan
    • Department of Physics, Kyoto University, Japan

  • Chanchal Sow

    • Department of Physics, Graduate School of Science, Kyoto University
    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan

  • Ryo Numasaki

    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan

  • Giordano Mattoni

    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan

  • Shingo Yonezawa

    • Dept. of Physics, Kyoto University
    • Department of Physics, Kyoto University, Kyoto 606-8502, Japan
    • Department of Physics, Kyoto University, Japan

  • Naoki Kikugawa

    • Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
    • National Institute for Material Science, Tsukuba, Ibaraki
    • National Institute for Materials Science, Tsukuba
    • National Institute for Materials Science
    • Quantum Transport Properties Group, National Institute for Materials Science (NIMS), Tsukuba 305-0003, Japan
    • National Institute for Material Science

  • Shinya Uji

    • National Institute for Materials Science
    • Quantum Transport Properties Group, National Institute for Materials Science (NIMS), Tsukuba 305-0003, Japan