Local versus Global Superconductivity in Atomic Layer Indium on Si(111)

ORAL

Abstract

Superconductivity at the two dimensional limit has attracted intense interest, and monolayer Indium on Si(111) provides a perfect platform for investigating this fascinating phenomenon. To better understand the role of defects in superconductivity, we studied superconducting monolayer Indium films by tailoring the step density of the substrate. We probed the superconductivity microscopically using scanning tunneling microscopy and spectroscopy. The macroscopic superconducting properties of the same sample were also probed using in-situ double coil mutual inductance measurements to determine the superfluid density and the transition temperature (Tc). By establishing local and global Tc correspondence, we uncover the intriguing nature of 2D superconductivity in indium atomic layer superconductors.

*This work was supported by Office of Naval Research (ONR), N-00014-14-1-0330, National Science Foundation (NSF), DMR-1506678, and Welch Foundation, F-1672.

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Presenters

  • Mengke Liu

    • University of Texas at Austin

Authors

  • Mengke Liu

    • University of Texas at Austin

  • Hyoungdo Nam

    • University of Texas at Austin

  • Jungdae Kim

    • University of Texas at Austin
    • Department of Physics,BRL, and EHSRC, University of Ulsan, Ulsan 44610, Korea (the Republic of)
    • Physics, Ulsan University, Korea

  • Chih-Kang Shih

    • Department of Physics, The University of Texas at Austin, Austin, Texas, 78712, USA.
    • University of Texas at Austin
    • Physics, University of Texas at Austin
    • Department of Physics, University of Texas at Austin, TX 78712, United States
    • Department of Physics, The University of Texas at Austin
    • Department of Physics, The University of Texas at Austin, USA