Non-Fermi liquid behavior in overdoped iron-pnictide Ba(Fe,Co,Ni)2As2

ORAL

Abstract

Very low-temperature specific heat was used to study a series of single-crystal iron-based intermetallic compounds with the ThCr2Si2 structure with transition metal substitution used to heavily over-dope the system. This system has been found to exhibit non-Fermi liquid characteristics in transport, magnetic and thermodynamic properties. We will present low-temperature specific heat capacity measurements of this compound in order to elucidate the non-Fermi liquid nature of the ground state and to help elucidate the origin of these properties and their relation to superconductivity.

*This work was supported by AFOSR-MURI FA9550-09-1-0603.

–

Authors

  • Alex Hughes

    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742

  • Yasuyuki Nakajima

    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland

  • Kevin Kirshenbaum

    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742
    • Center for Nanophysics and Advanced Materials, Dept. of Physics, University of Maryland, College Park

  • Shanta R. Saha

    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland-College Park
    • Ceter for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742

  • Tyler Drye

    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland-College Park
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742

  • Johnpierre Paglione

    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland-College Park
    • Ceter for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742
    • University of Maryland
    • Department of Physics, University of Maryland
    • Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742
    • Center for Nanophysics and Advanced Materials, Dept. of Physics, University of Maryland, College Park