APS Logo

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.

–

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