Elastoresistivity measurements in a 65 T pulsed magnet on Fe-based superconductors

ORAL

Abstract

One of the most striking signatures of the nematic transition in the underdoped iron-based superconductors is a diverging elastoresistivity, which is the linear response of the resistivity anisotropy to the corresponding symmetry-breaking strain. Elastoresistivity, however, cannot be measured in the superconducting state; tracking the nematic fluctuations down to the putative quantum critical point near optimal doping necessitates the use of extreme magnetic fields to suppress superconductivity. We report the first elastoresistivity experiments in pulsed magnetic fields up to 65 T on near-optimally-doped Ba(Fe1-xCox)2As2 at temperatures down to 1.3 K, and discuss the technical advances required to make such a measurement possible within the few millisecond window when the field is above Hc2. These new techniques expand the applicability of elastoresistivity measurement for disentangling the role of nematic fluctuations in strongly correlated systems.

*This work was supported by the Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-76SF00515. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.

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Presenters

  • Joshua Straquadine

    • Physics, Stanford University
    • Stanford University

Authors

  • Joshua Straquadine

    • Physics, Stanford University
    • Stanford University

  • Johanna Palmstrom

    • Stanford University

  • Philip Walmsley

    • Physics, Stanford University
    • Stanford University

  • Alexander T Hristov

    • Stanford University

  • Franziska Weickert

    • Florida State University
    • National High Magnetic Field Laboratory, Los Alamos
    • NHMFL, FSU
    • NHMFL, Los Alamos National Labs
    • Pulsed Field Faclity, National High Magnetic Field Laboratory

  • Fedor F. Balakirev

    • Pulsed Field Faclity, National High Magnetic Field Laboratory

  • Marcelo Jaime

    • National High Magnetic Field Laboratory, Los Alamos
    • Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory, Los Alamos, NM 87545
    • NHMFL, Los Alamos National Labs
    • NHMFL-LANL
    • Pulsed Field Faclity, National High Magnetic Field Laboratory

  • Ross McDonald

    • Los Alamos National Laboratory
    • Los Alamos National Labs
    • National High Magnetic Field Laboratory, LANL
    • Pulsed Field Faclity, National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory

  • Ian R Fisher

    • Physics, Stanford University
    • Applied Physics, Stanford University
    • Stanford University
    • Pulsed Field Faclity, National High Magnetic Field Laboratory