Non-Fermi liquid behavior in overdoped iron-pnictides

ORAL

Abstract

Electrical transport, magnetic susceptibility and heat capacity data are presented on a series of single-crystal iron-based intermetallic compounds with the ThCr$_2$Si$_2$ structure with transition metal substitution used to heavily over-dope the system. We will present observations of unusual temperature dependences in transport, susceptibility and electronic specific heat that indicate an unexpected deviation from Fermi liquid behavior that persists to milliKelvin temperatures.

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Authors

  • Johnpierre Palione

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

  • Kevin Kirshenbaum

    • University of Maryland

  • Shanta Saha

    • University of Maryland

  • Tyler Drye

    • University of Maryland