Quantum Oscillations in the Specific Heat of Ultraclean YBCO in 45T magnetic fields

ORAL

Abstract

We report specific heat measurements of Ortho-II YBCO in a magnetic field as large as 45T to directly compare the superconducting state with the normal state at low temperatures. This thermodynamic measurement of the electronic density of states determines the total number of carrier pockets in the two-dimensional Fermi surface of Ortho-II YBCO. These measurements also reveal quantum oscillations in the specific heat that provide a bulk measurement of the quasiparticle density of states in the d-wave mixed state.

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Authors

  • Scott Riggs

    • NHMFL/FSU

  • Jonathan B. Betts

    • LANL
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory

  • Suchitra Sebastian

    • Cambridge

  • Neil Harrison

    • LANL
    • Los Alamos National Laboratory

  • Albert Migliori

    • LANL
    • National High Magnetic Field Laboratory, Los Alamos National Laboratory

  • Greg Boebinger

    • NHMFL/FSU

  • Ruixing Liang

    • Simon Fraser University

  • Walter Hardy

    • Simon Fraser University

  • Doug Bonn

    • Simon Fraser University