Effect of variable-energy electron irradiation on superconductivity in Ba<sub>1-x</sub>K<sub>x</sub>Fe<sub>2</sub>As<sub>2</sub> crystals

ORAL

Abstract

Point-like defects produced by MeV-range electron irradiation can be used as a phase-sensitive probe of the energy gap structure in superconductors. In complex compounds, the probability of knocking out an ion from a particular lattice site depends on the type of the ion and the incoming electron energy. Here we examine the effect of irradiation on superconducting Tc and electrical resistivity of in Ba1-xKxFe2As2 single crystals using electrons of different energies, from 1.0 MeV to 2.5 MeV. From the resistivity measurements in-situ (during irradiation) and ex-situ (in a separate cryostat), the relation between the changes in Tc and residual resistivity as a function of electron energy was determined. The results will be discussed in a broader context of the connection between particular crystal structure and superconductivity.

*Work at the Ames Laboratory was supported by the Department of Energy- Basic Energy Sciences under Contract No. DE-AC02-07CH11358.

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Presenters

  • Kyuil Cho

    • Ames Laboratory US DOE, Ames, Iowa
    • Ames Laboratory
    • Ames Laboratory and Iowa state University, USA
    • Ames Laboratory and Iowa State University, Ames, IA, USA
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA

Authors

  • Kyuil Cho

    • Ames Laboratory US DOE, Ames, Iowa
    • Ames Laboratory
    • Ames Laboratory and Iowa state University, USA
    • Ames Laboratory and Iowa State University, Ames, IA, USA
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA

  • Makariy A Tanatar

    • Iowa State University
    • Ames Laboratory and Iowa state University, USA
    • Ames Laboratory

  • Yong Liu

    • Ames Laboratory US DOE, Ames, Iowa
    • Ames Laboratory and Iowa state University, USA

  • Thomas Antony Lograsso

    • Ames Laboratory US DOE, Ames, Iowa
    • Ames Laboratory and Iowa state University, USA

  • Ruslan Prozorov

    • Ames Laboratory US DOE, Ames, Iowa
    • Iowa State University
    • Ames Laboratory, Iowa State University
    • Ames Laboratory
    • Ames Laboratory and Iowa state University, USA
    • Ames Laboratory and Iowa State University, Ames, IA, USA
    • Ames Laboratory and Department of Physics & Astronomy, Iowa State University, Ames, IA 50010, USA

  • Marcin Konczykowski

    • Laboratoire des Solides Irradiés, École Polytechnique, F-91128 Palaiseau, France
    • Ecole Polytechnique
    • Ecole Polytechnique, Palaiseau, France
    • LSI, Ecole Polytechnique
    • Laboratoire des Solides Irradies, Ecole Polytechnique