Investigation of Pairing Symmetry in Pt-Substituted BaFe2As2

ORAL

Abstract

We present results from several measurements on BaFe1.9Pt0.1As2 single crystals designed to measure the superconducting gap structure. Low temperature thermal conductivity was measured in magnetic fields up to 15 T and will be compared to other materials. Point-contact Andreev reflection spectroscopy measurements were made using the needle-anvil technique and the spectra analyzed using BTK theory. Raman spectroscopy was used to probe excitations in multiple channels. Finally, angle-resolved photoemission spectroscopy was used to provide further information about the band structure and superconducting gap. We will discuss the implications that the combination of these results reveal about the superconducting order parameter in this system.

*Work at Maryland was supported by AFOSR-MURI FA9550-09-1-0603; at Rutgers by US DOE, Office of BES, Award DE-SC0005463; and at Dresden by DFG grants BO 1912/3-1 (SPP1458) and BO 1912/2-2.

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Authors

  • S. Ziemak

    • University of Maryland, College Park, Center for Nanophysics and Advanced Materials

  • K. Kirshenbaum

    • University of Maryland, College Park, Center for Nanophysics and Advanced Materials

  • S.R. Saha

    • University of Maryland, College Park, Center for Nanophysics and Advanced Materials

  • R. Hu

    • University of Maryland, College Park, Center for Nanophysics and Advanced Materials

  • J. Paglione

    • University of Maryland, College Park, Center for Nanophysics and Advanced Materials

  • J.-Ph. Reid

    • Universite de Sherbrooke

  • R. Gordon

    • Universite de Sherbrooke

  • L. Taillefer

    • Universite de Sherbrooke

  • A. Ignatov

    • Rutgers University

  • D. Kolchmeyer

    • Rutgers University

  • G. Blumberg

    • Rutgers University

  • D. Evtushinsky

    • IFW-Dresden

  • S. Thirupathaiah

    • IFW-Dresden

  • S.V. Borisenko

    • IFW-Dresden