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Resonant study of the vortex state in LSCO cuprates up to 35 T.

ORAL

Abstract

We used a newly developed resonant probe of elastic moduli to explore the phase diagram of the vortex state in LSCO cuprates near critical doping x=0.20, up to 35 T. The elastic anomaly at the vortex melting transition---jump down upon entry into the vortex solid---is consistent with a second order phase boundary. The magnitude of the jump, ~0.1 GPa at 20 T is consistent with expected magnitude ~H2/8π of elastic moduli of the vortex lattice. We also observe a second thermodynamic anomaly at around 5T in the vortex-solid state that is weakly dependent on temperature and field orientation that appears to have dynamic origin. Finally, we will discuss magnetotropic coefficient measurements in the same system.

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Presenters

  • Arkady Shekhter

    National High Magnetic Field Laboratory, DC Facility, National High Magnetic Field Laboratory, Natl High Magnetic Field Lab, NHMFL

Authors

  • Arkady Shekhter

    National High Magnetic Field Laboratory, DC Facility, National High Magnetic Field Laboratory, Natl High Magnetic Field Lab, NHMFL

  • Ali Bangura

    Natl High Magnetic Field Lab

  • Andreas Rydh

    stockholm university, university of stockholm, Stockholm University, Physics, Stockholm University

  • Kimberly Modic

    Max Planck Institute for Chemical Physics of Solids, Max Planck Dresden, Max Planck Institute, max planck dresden

  • Gregory Scott Boebinger

    National High Magnetic Field Laboratory, Natl High Magnetic Field Lab, NHMFL

  • Brad J Ramshaw

    Cornell University, Cornell university, Cornell

  • Ross McDonald

    Los Alamos National Laboratory, physics, los alamos national lab, NHMFL-PFF, Los Alamos National Laboratory, Los Alamos Natl. Lab, Los Alamos Natl Lab, National High Magnetic Field Laboratory, LANL