One-Dimensional Nature of Pairing and Superconductivity at the LaAlO<sub>3</sub>/SrTiO<sub>3</sub> Interface

ORAL

Abstract

We examine superconductivity in LaAlO3/SrTiO3 channels in which the channel width transitions from the 1D to 2D regime. The superconducting critical current is independent of the channel width and increases approximately linearly with the number of parallel channels. Signatures of electron pairing outside of the superconducting phase are also independent of channel width. Collectively, these results indicate that electron pairing and superconductivity exist at the boundary of these channels and are absent within the interior region of the channels. The intrinsic 1D nature of superconductivity at the LaAlO3/SrTiO3 interface imposes strong physical constraints on possible electron pairing mechanisms.

*This work is supported by the National Science Foundation (DMR-1609519). The work at University of Wisconsin-Madison (thin film design, growth and characterizations) was supported by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES), under award number DE-FG02-0

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Presenters

  • Yun-Yi Pai

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

Authors

  • Yun-Yi Pai

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

  • Hyungwoo Lee

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

  • Jung-Woo Lee

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

  • Anil Annadi

    • Department of Physics and Astronomy, University of Pittsburgh

  • Guanglei Cheng

    • University of Science and Technology of China
    • Department of Physics and Astronomy, University of Pittsburgh

  • Shicheng Lu

    • Department of Physics and Astronomy, University of Pittsburgh

  • Michelle Tomczyk

    • Pennsylvania State University
    • Department of Physics and Astronomy, University of Pittsburgh

  • Mengchen Huang

    • Univ of California, Santa Barbara
    • Department of Physics and Astronomy, University of Pittsburgh
    • Physics, University of California, Santa Barbara

  • Chang-Beom Eom

    • University of Wisconsin-Madison
    • Univ of Wisconsin-Madison
    • Univ of Wisconsin, Madison
    • Department of Material Science and Engineering, University of Wisconsin-Madison
    • Matls Sci & Eng, University of Wisconsin-Madison
    • University of Wisconsin
    • Department of Materials Science and Engineering, University of Wisconsin-Madison
    • University of Wisconsin–Madison
    • MS&E, University of Wisconsin
    • Physics, University of Wisconsin–Madison
    • Department of Materials Science and Engineering, University of Wisconsin - Madison

  • Patrick Irvin

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

  • Jeremy Levy

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