Superconductivity in 1D Zigzag Nanowires

ORAL

Abstract

We investigate the effects of the geometrical shapes of the 1D nanowires created at LaAlO3/SrTiO3 in order to study the origin of superconductivity of SrTiO3, which has puzzled researchers for more than 50 years. It was recently suggested that electron pairing in SrTiO3 may be related to ferroelastic domain walls [1]. By using conductive-AFM lithography [2] to create 1D superconducting nanowires at the LaAlO3/SrTiO3 interface, we can investigate the influence of nanowire shape, and in particular the effect of sharp turns in the nanowire, on superconducting behavior in the nanowires. We find a significant stabilization of the superconducting state in “zigzag” wires compared with straight control wires, both created at the same time and located only a few micrometers apart. We discuss possible origins for this behavior within the context of ferroelastic domain structure that surrounds the nanowires.

[1] Y.-Y. Pai, et al., Phys. Rev. Lett. 120, 147001 (2018).
[2] C. Cen, et al., Nature Materials 7, 298 (2008).

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Presenters

  • Yun-Yi Pai

    Department of Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

Authors

  • Yun-Yi Pai

    Department of Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

  • Megan Briggeman

    Department of Physics and Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

  • Hyungwoo Lee

    Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison, University of Wisconsin–Madison

  • Jung-Woo Lee

    Department of Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin–Madison, University of Wisconsin-Madison

  • Mengchen Huang

    Department of Physics and Astronomy, University of Pittsburgh, Physics, University of California-Santa Barbara, Physics and Astronomy, University of Pittsburgh, University of Pittsburgh

  • Jianan Li

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Chang-Beom Eom

    Department of Materials Science and Engineering, University of Wisconsin–Madison, Department of Materials Science and Engineering, University of Wisconsin-Madison, University of Wisconsin-Madison, Department of Material Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, University of Wisconsin-Madison, Materials Science and Engineering, Univ of Wisconsin-Madison, University of Wisconsin–Madison

  • Patrick Irvin

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh

  • Jeremy Levy

    Department of Physics and Astronomy, University of Pittsburgh, Department of Physics, University of Pittsburgh, University of Pittsburgh, Department of Physics & Astronomy, University of Pittsburgh, Physics and Astronomy, University of Pittsburgh