Scanning Tunneling Spectroscopy, Angle-resolved Photoemission Spectroscopy and Double-coil Mutual Inductance Investigation of Single Crystalline FeSe Superconductors

ORAL

Abstract

We report investigation of single crystalline FeSe superconductors by combining scanning tunneling microscopy/spectroscopy (STM/S), angle-resolved photoemission spectroscopy (ARPES) and double-coil mutual inductance measurement, which were all applied in-situ to a sample cleaved in an ultra-high-vacuum (UHV) chamber. Using STM/S, we clearly observed the 1×1 atomic topography and the superconducting gap of this single crystal. In addition, ARPES was used to measure the band dispersion of FeSe. Finally, using a home built double-coil mutual inductance system, operating in UHV, we measured its superfluid density. These measurements shed light on the origin of superconductivity in FeSe. Additionally, using FeSe as a superconducting platform, we are investigating the proximity effect with other 2D materials.

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Presenters

  • Mengke Liu

    Physics, Univ of Texas, Austin

Authors

  • Mengke Liu

    Physics, Univ of Texas, Austin

  • Hyoungdo Nam

    Physics, University of Texas at Austin, Physics, Univ of Texas, Austin, Department of Physics, Univ of Texas, Austin

  • Jiaqiang Yan

    Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge National Lab, Oak Ridge National Laboratory, Ames Laboratory, Iowa State University

  • Jianshi Zhou

    Univ of Texas, University of Texas, University of Texas at Austin, Texas Materials Institute, University of Texas at Austin, Univ of Texas, Austin, Mechanical Engineering, University of Texas at Austin, University of Texas, at Austin

  • Chih-Kang Shih

    the University of Texas at Austin, Physics, University of Texas at Austin, Physics, Univ of Texas, Austin, Department of Physics, Univ of Texas, Austin, Physics, UT Austin, Univ of Texas, Austin