Anisotropy studies in microstructured Ce-115 heavy fermion superconductors

ORAL

Abstract

We recently uncovered the nematic character of a field-induced state in the heavy-fermion superconductor CeRhIn5, emerging at magnetic fields above 30 T and temperatures below 2 K [1]. The in-plane conductivity develops a sudden anisotropy ρa/ρb at low temperatures, which is linked to the magnetic field orientation. This raises questions on the role of magnetic ordering in determining the magnetotransport anisotropy. The 4f-moments of CeRhIn5 order anti-ferromagnetically, while in the related superconductors CeCoIn5 and CeIrIn5 no static magnetic order appears. We systematically investigate the anisotropic magnetotransport in sub-micron sized transport devices fabricated using Focused Ion Beam machining from highest-quality single crystals. We present a comparative analysis of the magnetoresistance anisotropy in Ce(Co,Rh,Ir)In5, and experimentally investigate the role of electronic layeredness in these superconductors.
[1] Ronning, F. et al. Nature 548, 313–317 (2017)

*This work is supported by the Max Planck Society and the Deutsche Forschungsgemeinschaft (DFG). Work at Los Alamos National Laboratory was supported by the US Department of Energy, BES. Work at the National High Magnetic Field Laboratory was supported by NSF, the State of Florida, and the US DOE.

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Presenters

  • Toni Helm

    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute Dresden
    • MQM, Max Planck Inst CPFS

Authors

  • Toni Helm

    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute Dresden
    • MQM, Max Planck Inst CPFS

  • Maja Bachmann

    • Max Planck Institute for Chemical Physics of Solids
    • MQM, Max Planck Inst CPFS

  • Kent Shirer

    • Max Planck Institute for Chemical Physics of Solids
    • MQM, Max Planck Inst CPFS

  • Kimberly Putkonen

    • MQM, Max Planck Inst CPFS

  • Tino Zimmerling

    • Max Planck Institute for Chemical Physics of Solids
    • MQM, Max Planck Inst CPFS

  • Amelia Estry

    • MQM, Max Planck Inst CPFS

  • Xiangwei Huang

    • MQM, Max Planck Inst CPFS

  • Fedor Balakirev

    • Los Alamos National Laboratory
    • Los Alamos National Lab NHMFL
    • National High Magnetic Field Laboratory
    • NHMFL-LANL
    • MS E536, National High Magnetic Field Laboratory, LANL

  • Eric Bauer

    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory
    • Los Alamos National Lab
    • Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Filip Ronning

    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos Natl Lab
    • Los Alamos National Laboratory
    • Condensed Matter and Magnetic Science Group, Los Alamos National Laboratory
    • Condensed Matter and Magnet Science Group, Los Alamos National Laboratory

  • Philip Moll

    • Max Planck Institute for Chemical Physics of Solids
    • MQM, Max Planck Inst CPFS