Atomicscale Investigation of Proximity Effect at a Molecular-Superconductor-Metal Boundary

ORAL

Abstract

Proximity effects of nanoscale molecular clusters, (BETS)$_{2}$-GaCl$_{4}$, on Ag(111)have been investigated by using low temperature tunneling spectroscopy and spectroscopic mapping. At a far distance from the superconductor-metal boundary, the dI/dV tunneling spectroscopic data show the surface state on-set of two-dimensional nearly free electrons on Ag(111) surface at -65 mV. Strikingly, the intensity of the surface state rapidly decreases when the dI/dV data are recorded closer to the boundary. At $\sim$ 2nm distance, the surface state is completely quenched. Moreover, the formation of pseudo-gap state is already observed far from the metal-superconductor boundary, which later transform into the superconducting gap. This work provides detailed electronic structure evolution across a metal-superconductor boundary at an atomic scale.

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Authors

  • Sajida Khan

    NQPI Dept of Physics and astronomy Ohio University, NQPI, and Dept of Physics \& Astronomy, Ohio University

  • Kendal Clark

    NQPI Dept of Physics and astronomy Ohio University

  • Hao Chang

    NQPI Dept of Physics and astronomy Ohio University, NQPI, and Dept of Physics \& Astronomy, Ohio University

  • Kyaw Zin Latt

    NQPI Dept of Physics and astronomy Ohio University, NQPI, and Dept of Physics \& Astronomy, Ohio University

  • Kurt Baughman

    Center for Nanoscale Materials, Argonne National Lab, Argonne, Illinois, Department of Physics and Astronomy, Ohio University, Athens, Ohio, Ohio University, Los Alamos Nationa Laboratory, National Taiwan University, University of Hamburg, Trinity College, Dublin, Serbian Academy of Sciences and Arts, Institute for Multidisciplinary Research, University of Belgrade, National High Magnetic Field Laboratory, Brookhaven National Laboratory, The University of Akron, NQPI, Physics and Astronomy Dept., Ohio University, GNS \& MANA Satellite, CEMES, CNRS, IMRE, A*STAR, Nanoscale and Quantum Phenomena Institute (NQPI), Physics and Astronomy Dept., Ohio University, Nanoscale and Quantum Phenomena Institute, and Department of Physics \& Astronomy, Ohio University, Athens, OH 45701, CEMES, CNRS, Toulouse, France, Nanoscale and Quantum Phenomena Institute, and Department of Physics \& Astronomy, Ohio University, Athens, OH, NQPI, and Department of Physics \& Astronomy, Ohio University, Athens, OH, NQPI Dept of Physics and astronomy Ohio University, Naval Research Labs, Washington DC 20375, John Carroll University, Lawrence Livermore National Laboratory, The Ohio State University Department of Physics, Nanoscale and Quantum Phenomena Institute, Department of Physics and Astronomy, Ohio University, Athens, Ohio, Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, Richland, Washington, National High Magnetic Field Laboratory, Tallahassee, University of Wisconsin Oshkosh, Wittenberg University, NQPI, Ohio University; CNM Argonne National Laboratory, APS, CNM, Argonne National Laboratory, Ohio University, Athens 45701, USA, None, Dept. of Physics, Hiram College, Physics Department, Cleveland State University, Flash Center for Computational Science, University of Chicago, Center for Energy Research, University of California San Diego; Lawrence Livermore National Laboratory, Ohio Northern University, Ohio University Zanesville

  • Saw-Wai Hla

    NQPI Dept of Physics and astronomy Ohio University, Nanoscience and technology Division Argonne National Lab