Quasi-Static Internal Magnetic Field Detected in the Pseudogap Phase of Bi2+xSr2−xCaCu2O8+δ by μSR

ORAL

Abstract

We report muon spin relaxation (μSR) measurements of optimally-doped and overdoped Bi2+xSr2−xCaCu2O8+δ (Bi2212) single crystals that reveal the presence of a weak temperature dependent quasi-static internal magnetic field of electronic origin in the superconducting (SC) and pseudogap (PG) phases. In both samples the internal magnetic field persists up to 160 K, but muon diffusion prevents following the evolution of the field to higher temperatures. We consider the evidence from our measurments in support of PG order parameter candidates, namely, electronic loop currents and magnetoelectric quadrupoles.

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Presenters

  • Sarah Dunsiger

    Simon Fraser University, Physics, Simon Fraser University, Department of Physics, Simon Fraser University

Authors

  • Anand Pal

    Department of Physics, Simon Fraser University

  • Sarah Dunsiger

    Simon Fraser University, Physics, Simon Fraser University, Department of Physics, Simon Fraser University

  • Kolawole Akintola

    Department of Physics, Simon Fraser University

  • Alex Fang

    Physics, Simon Fraser University, Department of Physics, Simon Fraser University

  • Abdo Elhosary

    Department of Physics, Simon Fraser University

  • Motoyuki Ishikado

    Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society (CROSS)

  • Hiroshi Eisaki

    IAIST, Inst. of Advanced Industrial Science and Tech., Tsukuba,, National Institute for Advanced Industrial Science and Technology, National Institute of Advanced Industrial Science and Technology, Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology, AIST

  • Jeff Sonier

    Physics, Simon Fraser University, Department of Physics, Simon Fraser University