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).

*This work is supported by the NSF (DMR-1609519). C-BE acknowledges DOE Office of Science, Office of Basic Energy Sciences (DE-FG02-06ER46327).

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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