Quasi-Static Internal Magnetic Field Detected in the Pseudogap Phase of Bi<sub>2+x</sub>Sr<sub>2−x</sub>CaCu<sub>2</sub>O<sub>8+δ</sub> 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.

*The present work was partially supported by CIFAR, NSERC, and JSPS KAKENHI Grant Number JP15K17712

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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