Superconductivity of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ with and without artificial disorder over the entire doping range

ORAL

Abstract

Effects of electron irradiation on superconducting transition temperature and in-plane London penetration depth were studied in single crystals of Ba$_{1-x}$K$_x$Fe$_2$As$_2$ (x= 0.22, 0.34, 0.47, 0.56, 0.65, 0.80, 0.82, 0. 90, 0.92, 1.0). Electron irradiation introduces point - like disorder that gives insight into the superconducting gap structure by studying the effects of increasing scattering. We studied the entire superconducting ``dome'' and find distinctly different behaviours in underdoped, optimal, and overdoped compositions and unusual behaviour near x = 0.7 - 0.8.

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Authors

  • Serafim Teknowijoyo

    Ames Laboratory and Iowa State University, USA

  • Kyuil Cho

    Ames Laboratory and Iowa State University, USA, Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Makariy Tanatar

    Ames Laboratory USDOE, Ames, IA 50011, Ames Laboratory and Iowa State University, USA, Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Ruslan Prozorov

    Ames Laboratory and Iowa State University, USA, Ames laboratory and Department of Physics and Astronomy, Iowa State University

  • Yong Liu

    Ames Laboratory USDOE, Ames, IA 50011, Ames Laboratory and Iowa State University, USA, Division of Materials Sciences and Engineering, Ames Lab., US DOE, Ames, IA 50011, Max-Planck-Institut fuer Festkoerperforschung

  • Thomas A. Lograsso

    Ames Laboratory and Iowa State University, USA, Division of Materials Sciences and Engineering, Ames Lab, US DOE, and Dept. of Materials Science and Engineering, Iowa State Univ., Ames, IA 50011

  • Marcin Konczykowski

    Ecole Polythechnique, France, LSI, Ecole Polytechnique, France, Ecole Polytechnique, France