Fine structure in the thermal conductivity of unconventional superconductor CeCoIn<sub>5</sub> in rotating magnetic field

ORAL

Abstract

Thermal-conductivity measurements are a powerful method of studying superconductivity. Cooper pairs of the condensate do not carry heat, and only unpaired electrons participate in a heat transport. We have measured the thermal conductivity of unconventional superconductor CeCoIn5 in a rotating magnetic field. At a sufficiently low temperature below 100 mK, multiple features, including sharp resonances, are observed in the thermal conductivity as a function of the direction of the magnetic field. This fine structure of thermal conductivity may come from the interaction between the magnetic field and normal electrons in this multiband superconductor. Our measurements represent a new way of studying the superconducting state of a material.

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Work at Los Alamos was supported by the Los Alamos Laboratory Directed Research and Development program.

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Presenters

  • Duk Young Kim

    • Institute for Basic Science
    • Institue of Basic Science, SKKU, South Korea

Authors

  • Roman Movshovich

    • Los Alamos National Laboratory
    • Condensed Matter and Magnet Sciences, Los Alamos National Laboratory

  • Shizeng Lin

    • Los Alamos National Laboratory
    • Theoretical Division, Los Alamos National Laboratory

  • Duk Young Kim

    • Institute for Basic Science
    • Institue of Basic Science, SKKU, South Korea

  • Eric Bauer

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA
    • Los Alamos National Labs

  • Filip Ronning

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA
    • Los Alamos National Labs