Nernst effect in the pnictide superconductor Ba(Fe$_{1-x}$Co$_x$)$_2$As$_2$

ORAL

Abstract

In an attempt to shed light on the electronic transformations that pnictide superconductors undergo in different regions of their phase diagram, we have measured the Nernst effect of Ba (Fe$_{1-x}$Co$_x$)$_2$As$_2$ as a function of Co concentration. The data is presented and analyzed in terms of its two contributions, from superconducting fluctuations and normal- state quasiparticles, respectively.

–

Authors

  • Xigang Luo

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada

  • H. Shakeripour

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada

  • M.A. Tanatar

    • Ames Laboratory, Ames, Iowa 50011, USA

  • J.-Ph. Reid

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada

  • J. Chang

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada

  • F. Lalibert\'e

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada

  • N. Doiron-Leyraud

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada

  • N. Ni

    • Ames Laboratory, Ames, Iowa 50011, USA; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • S.L. Bud'ko

    • Ames Laboratory, Ames, Iowa 50011, USA; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • P.C. Canfield

    • Ames Laboratory, Ames, Iowa 50011, USA; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • R. Prozorov

    • Ames Laboratory, Ames, Iowa 50011, USA; Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA

  • Louis Taillefer

    • D\'epartement de physique, Universit\'e de Sherbrooke, Sherbrooke, Canada