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.

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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