Low temperature scanning tunneling microscopy and spectroscopy investigation of FeSe$_{1-\delta}$ and FeSe$_{1-x}$S$_{x}$ single crystals

ORAL

Abstract

Due to its relatively simple crystallographic structure, investigations into FeSe$_{1-\delta}$ have held the promise to provide an avenue towards a better understanding of the mechanism of superconductivity in the iron-pnictides/chalcogenides and the relationship between nematicity and superconducting state. Here, we present low-temperature scanning tunneling microscopy and spectroscopy investigations of high purity FeSe$_{1-\delta}$ and sulfur substituted FeSe$_{1-x}$S$_x$ single crystals. Vortex core anisotropy and vortex matter in these systems will be discussed.

*Work at Temple University was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0004556.

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Authors

  • S. A. Moore

    • Department of Physics, Temple University, Philadelphia, PA 19122

  • J. Curtis

    • Department of Physics, Temple University, Philadelphia, PA 19122 ; Department of Physics, Drexel University, Philadelphia, PA 19104

  • M. Abdel-Hafiez

    • Center for High Pressure Science and Technology Advanced Research, Shanghai, 201203, China

  • O. S. Volkova

    • Low Temperature Physics and Superconductivity Department, Physics Faculty, M.V. Lomonosov Moscow State University, Moscow 119991, Russia

  • A. N. Vasiliev

    • Low Temperature Physics and Superconductivity Department, Physics Faculty, M.V. Lomonosov Moscow State University, Moscow 119991, Russia

  • D. A. Chareev

    • Institute of Experimental Mineralogy, Russian Academy of Sciences, 142432 Chernogolovka, Moscow District, Russia

  • G. Karapetrov

    • Department of Physics, Drexel University, Philadelphia, PA 19104

  • M. Iavarone

    • Department of Physics, Temple University, Philadelphia, PA 19122