The Hall Efffect at Ultra High Fields in Ba-122

ORAL

Abstract

To this day, the basic charge transport phenomenology of the high-Tc cuprates, including the T-linear resistivity near optimal doping and the T-dependent Hall effect, has remained mysterious. The observation of a very similar set of transport properties in the iron based superconductors supports the idea that these properties are closely tied to the physics of high-Tc superconductivity in general, and gives new urgency to the problem. I will report Hall effect measurements up to 65 Tesla on samples of the iron-pnictide superconductor BaFe2(As1-xPx)2 form across the superconducting dome, providing a comprehensive picture of the Hall effect in these materials. There is a strong enhancement of R_H centered around optimal doping that bears a striking resemblance to what is seen in the cuprates and in quantum critical metals and also appears to be intimately tied to the superconductivity. I will discuss the implications of these observations and the paths they open up for obtaining a clearer understanding of the Strange Metal state.

*This work was supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant GBMF4374, and by the NHMFL-PFF at Los Alamos National Laboratory through NSF Cooperative Agreement No. DMR 1157490 and the DoE.

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Presenters

  • Ian Hayes

    • Physics, Univ of California - Berkeley
    • Univ of California - Berkeley
    • Physics, University of California Berkeley

Authors

  • Ian Hayes

    • Physics, Univ of California - Berkeley
    • Univ of California - Berkeley
    • Physics, University of California Berkeley

  • Nikola Maksimovic

    • Physics, Univ of California - Berkeley
    • Physics, University of California Berkeley

  • Mun Chan

    • National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • National High Magnetic Field Laboratory

  • Brad Ramshaw

    • Cornell University
    • Los Alamos National Labs
    • National High Magnetic Field Laboratory
    • Department of Physics, Cornell University
    • Laboratory of Atomic and Solid State Physics, Cornell University
    • Los Alamos National Laboratory
    • Laboratory for Atomic and Solid state Physics, Cornell University

  • Ross McDonald

    • Los Alamos National Laboratory
    • National High Magnetic Field Laboratory
    • Pulsed Field Facility, Los Alamos National Lab
    • Los Alamos Natl Lab
    • LANL/NHMFL
    • NHMFL-PFF, Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, LANL

  • James Analytis

    • University of California Berkeley
    • Physics, UC Berkeley
    • Physics, University of California, Berkeley
    • Univ of California - Berkeley
    • University of California, Berkeley
    • Physics, Univ of California - Berkeley
    • Physics, University of California Berkeley