Quantum Oscillations in FeAs in the Spin Density Wave State

ORAL

Abstract

Binary FeAs orders in a spin density wave (SDW) state at temperatures below TN $=$ 70 K, much like the iron pnictides and isostructural pressure-induced superconductors CrAs and MnP, making it an ideal system with which to study the relationship between spin-density wave magnetism and superconductivity. We will present a new single-crystal flux growth technique that produces the highest quality specimens to date and allows for the observation of quantum oscillations in high-field torque measurements. Analyzing the dependence of oscillation frequency and amplitude on temperatures and field angles, we will review the effective electron and hole carrier masses and Fermi surface geometry in the SDW state and compare to theoretical calculations.

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Authors

  • Daniel Campbell

    University of Maryland

  • David Parker

    Oak Ridge National Laboratory, Oak Ridge National Lab

  • Chris Eckberg

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

  • Kefeng Wang

    University of Maryland

  • David Graf

    National High Magnetic Field Laboratory, NHMFL, National High Magnetic Field Laboratory., National High Magnetic Field Laboratory Tallahassee, Florida State University, National High Magnetic Field Lab,Tallahassee

  • Johnpierre Paglione

    Univ of Maryland-College Park, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park 20742, USA, University of Maryland, Department of Physics, University of Maryland, MD, USA; Canadian Institute for Advanced Research, Center for Nanophysics and Advanced Materials, Department of Physics, University of Maryland, College Park, MD 20742, USA