Thermodynamic signature for the phase transition at the pseudogap temperature in underdoped YBCO (6.56)

ORAL

Abstract

The physics of the pseudogap, and its connection to the strange metal phase remain poorly understood. The outstanding problem is whether the apparent crossover between these two regimes is a thermodynamic phase boundary. We performed high precision resonant ultrasound spectroscopy measurement on de-twinned monocrystals of underdoped YBCO (6.56) in a broad temperature range up to 300 K. We find a compelling thermodynamic signature for the phase transition at the pseudogap temperature T = 270 K.

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Authors

  • Victor Fanelli

    National High Magnetic Field Laboratory, Los Alamos National Laboratory

  • Scott Riggs

    Stanford University, Stanford, National High Magnetic Field Laboratory, Florida State University

  • Arkady Shekhter

    National High Magnetic Field Laboratory, Florida State University

  • Yoko Suzuki

    National High Magnetic Field Laboratory, Los Alamos National Laboratory

  • Jonathan Betts

    NHMFL-PFF Los Alamos National Laboratory, National High Magnetic Field Laboratory, Los Alamos National Laboratory

  • Albert Migliori

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

  • Greg Boebinger

    National High Magnetic Field Laboratory, FSU/NHMFL, NHMFL/FSU, National High Magnetic Field Laboratory, Florida State University

  • Brad Ramshaw

    University of British Columbia, Vancouver, Canada, Department of Physics and Astronomy, University of British Columbia

  • Ruixing Liang

    University of British Columbia, Vancouver, Canada, Department of Physics and Astronomy, University of British Columbia

  • Walter Hardy

    University of British Columbia, Vancouver, Canada, Department of Physics and Astronomy, University of British Columbia

  • Doug Bonn

    University of British Columbia, Vancouver, Canada, Department of Physics and Astronomy, University of British Columbia