Strange metal Magnetoresistance and Hall effect in BaFe<sub>2</sub>(As<sub>1-x</sub>P<sub>x</sub>)<sub>2</sub>

 · Invited

Abstract

Among the most puzzling features of high-temperature superconductors is the behavior of the resistive non-superconducting state, often called a strange metal phase. Recently, the magnetic field-dependence of the resistivity, the magnetoresistance, of these materials has become a topic of intense interest. In particular, a linear-in-field magnetoresistance, and an unusual scaling relation with temperature, have been observed as quite general and puzzling phenomena in strange metals. In this talk, I will discuss a magnetoresistance model based on orbital motion in the presence of the sharply anisotropic Fermi surface and scattering time induced by antiferromagnetic order and fluctuations. I will present new experimental data demonstrating the validity of this model both in the antiferromagnetically ordered and strange metal phases of P-substituted BaFe2As2. Finally, I will discuss the potential applicability of these models to a variety of high-temperature superconducting materials, and possible extensions to the off-diagonal component of the magnetoresistance tensor (the hall resistivity), which often exhibits anomalous behavior in these materials as well.

*This work was supported as part of the Center for Novel Pathways to Quantum Coherence in Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science. N.M. was supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF9067.

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Presenters

  • Nikola Maksimovic

    • University of California, Berkeley

Authors

  • Nikola Maksimovic

    • University of California, Berkeley

  • Alexei Koshelev

    • Materials Science Division, Argonne National Laboratory
    • Argonne National Laboratory

  • Ian Hayes

    • Quantum Materials Center, Department of Physics, University of Maryland College Park
    • University of California, Berkeley
    • University of Maryland, College Park

  • Vikram Nagarajan

    • University of California, Berkeley
    • Physics, University of California, Berkeley

  • John Singleton

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Lab
    • Los Alamos National Laboratory
    • LANL, NHMFL
    • National High Magnetic Field Laboratory (NHMFL), Los Alamos

  • Thomas Schenkel

    • Lawrence Berkeley National Laboratory

  • James Analytis

    • University of California, Berkeley
    • University of California at Berkeley
    • Physics, University of California, Berkeley