Spectroscopic Properties of the <i>d</i>-wave BCS Superconductivity in Extremely Overdoped Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub>

ORAL

Abstract

The apex of the high Tc cuprates' superconducting dome is often clouded by multiple closely degenerate electronic orders, which is preceded by the even more enigmatic quasiparticle-less "strange metal". These unconventional phenomena quickly fade when the hole concentration exceeds the putative "pseudogap quantum critical point", but the pairing mechanism is still unidentified even in such heavily overdoped region. We report angle-resolved photoemission spectroscopy measurement of Bi-2212 in this "clean" limit with a respectful Tc of over 50K. By quantitatively re-establishing the weakly-coupled BCS regime in the foothill of the otherwise highly complex phase diagram, a few conventional possibilities are examined to shed light on the true pairing mechanism.

*U.S. Department of Energy, contract #DE-AC02-76SF00515

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Presenters

  • Yu He

    • Stanford University
    • Applied Physics, Stanford University

Authors

  • Yu He

    • Stanford University
    • Applied Physics, Stanford University

  • Su-Di Chen

    • Stanford University
    • Applied Physics, Stanford University

  • Makoto Hashimoto

    • SLAC
    • SLAC, Stanford University
    • SLAC National Laboratory
    • Stanford University
    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Laboratory
    • SSRL, SLAC

  • Kejun Xu

    • Stanford University and SLAC National Accelerator Laboratory
    • Stanford University
    • Applied Physics, Stanford University

  • Dongjoon Song

    • National Institute of Advanced Industrial Science and Technology
    • AIST

  • Yoshiyuki Yoshida

    • National Institute of Advanced Industrial Science and Technology
    • AIST

  • 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

  • Donghui Lu

    • SSRL/SLAC
    • SLAC
    • SLAC, Stanford University
    • SLAC National Laboratory
    • Stanford University
    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Laboratory
    • SSRL, SLAC

  • Zhi-Xun Shen

    • Stanford University
    • SLAC National Accelerator Laboratory
    • SLAC - Natl Accelerator Lab
    • Stanford Univ
    • SIMIS, Stanford University
    • Applied Physics, Stanford Univ
    • Stanford University and SLAC National Accelerator Laboratory
    • Applied Physics, Stanford University