Nematic superconducting phase fluctuations in a cuprate superconductor

ORAL

Abstract

We present angle-resolved transverse magnetoresistance measurements of single crystal thin films of the cuprate superconductor La2-xSrxCuO4, 0.02 ≤ x ≤ 0.25. The strong nematic signal in the normal state transverse resistance close to Tc originally found in [Wu, J., Bollinger, A.T., He, X. and Božović, I., 2017. Nature, 547(7664), pp.432-435] is identified as being due to superconducting fluctuations. By modelling the conductivity due to normal electrons and thermally occupied Cooper pairs (i.e. Aslamazov-Larkin paraconductivity) we find that the pair stiffness is exceptionally anisotropic, quasi one-dimensional, at low doping. We discuss the observations in the context of theories where anisotropic superconductivity is expected such as stripe or pair-density wave order. 

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Publication: Giant transverse magnetoresistance due to nematic superconducting phase fluctuations in a copper oxide
Jonatan Wardh, Mats Granath, Jie Wu, A. T. Bollinger, Xi He, and Ivan Bozovic, submitted (under review).
Nematic single-component superconductivity and loop-current order from pair-density wave instability, Jonatan Wardh, and Mats Granath, in preperation

Presenters

  • Mats Granath

    • Goteborg Univ

Authors

  • Mats Granath

    • Goteborg Univ

  • Jonatan Andreas Wardh

    • Goteborg Univ

  • Jie Wu

    • Brookhaven National Laboratory

  • Anthony T Bollinger

    • Brookhaven National Laboratory

  • Xi He

    • Yale University

  • Ivan Božović

    • Brookhaven National Laboratory
    • Department of Chemistry, Yale University; Energy Sciences Institute, Yale University;Department of Mechanical Engineering & Materials Science, Yale University