STM investigation of FeSe$_{1-x}$S$_{x}$

ORAL

Abstract

FeSe has the simplest structure among the Fe-based superconductors, and this very simplicity could provide the most appropriate venue of understanding the superconducting mechanism of Fe-based superconductors. High quality FeSe single crystals were grown in evacuated quartz ampoules using a KCl/AlCl flux and the structure of tetragonal P4/nmm was demonstrated by x-ray diffraction. Low temperature STM measurements were performed on FeSe$_{1-\delta}$ and FeSe$_{1-x}$S$_{x}$ with x=0.04 and 0.09. Effects of multiband superconductivity and vortex matter as a function of doping will be presented.

*G.K. and A.N.V. acknowledge the support by a grant from U.S. Civilian Research \& Development Foundation (CRDF Global).

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Authors

  • M. Iavarone

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

  • S.A. Moore

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

  • E. Lechner

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

  • J. Curtis

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

  • 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