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.

–

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