Molecular beam epitaxy and characterization of superconducting Sr<sub>2</sub>RuO<sub>4</sub> films

ORAL

Abstract

Growth of superconducting Sr2RuO4 thin films has been extremely challenging [1], while it has long been desired in order to realize junction and microfabricated device experiments. In this talk, we report molecular beam epitaxy (MBE) growth and characterization of superconducting Sr2RuO4 films [2]. Careful tuning of the Ru flux with an electron beam evaporator enables us to optimize growth conditions including the Ru/Sr flux ratio and also to investigate stoichiometry effects on the structural, defect, and transport properties of the superconducting films. The highest onset transition temperature of 1.1 K is observed for a slightly Ru-rich flux condition. The realization of superconducting Sr2RuO4 films via oxide MBE opens up a new route to study the exotic superconductivity of this material. [1] Y. Krockenberger et al., Appl. Phys. Lett. 97, 082502 (2010). [2] M. Uchida et al., APL Mater. 5, 106108 (2017).

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Presenters

  • Masaki Uchida

    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo
    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), Univ. of Tokyo

Authors

  • Masaki Uchida

    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo
    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), Univ. of Tokyo

  • Motoharu Ide

    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo

  • Hirosuke Watanabe

    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo

  • Kei Takahashi

    • RIKEN
    • RIKEN Center for Emergent Matter Science (CEMS)
    • RIKEN Center for Emergent Matter Science
    • CEMS, RIKEN
    • Center for Emergent Matter Science (CEMS), RIKEN

  • Yoshinori Tokura

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

  • Masashi Kawasaki

    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), University of Tokyo
    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), the University of Tokyo
    • Univ of Tokyo
    • The University of Tokyo
    • Department of Applied Physics and Quantum Phase Electronics Center, University of Tokyo
    • Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), Univ. of Tokyo
    • Applied Physics, University of Tokyo
    • Department of Applied Physics, The University of Tokyo
    • Department of Applied Physics, University of Tokyo