Fluctuating superconductivity and absence of charge order in heavily overdoped cuprate Bi-2212

ORAL

Abstract

We identify significant superconducting fluctiations on a single coherent, hole-like Fermi surface in heavily overdoped cuprate superconductor Bi-2212. No evidence of pseudogap or valence electron charge order are found in the meantime. Both ampitude and phase fluctuations are quantitatively estimated via measurements of resisitivity anisotropy, specific heat jump, and superconducting coherent length. The important role of the quasi-two-dimensional flat band and the van Hove singularity are discussed in the end.

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Presenters

  • Yu He

    Stanford University, SLAC National Accelerator Laboratory, Applied physics, Stanford University, Department of Applied Physics, Stanford University

Authors

  • Yu He

    Stanford University, SLAC National Accelerator Laboratory, Applied physics, Stanford University, Department of Applied Physics, Stanford University

  • Sudi Chen

    Stanford University, SLAC National Accelerator Laboratory, Applied physics, Stanford University

  • Makoto Hashimoto

    SLAC, SLAC national accelerator laboratory, SLAC National Accelerator Laboratory, Stanford University, SSRL, SLAC

  • Alex Frano

    Physics, University of California, San Diego, Physics, Univ of California - San Diego, Physics, University of California San Diego, Physics, University of California, Berkeley

  • Ming Yi

    Rice University, Physics, Rice University

  • Yu Song

    Physics, University of California, Berkeley, Rice University, University of California, Berkeley

  • Shan Wu

    Physics, University of California, Berkeley, University of California, Berkeley

  • Dongjoon Song

    Physics, Yonsei University, IBS-CCES, Seoul National University, National Institute of Advanced Industrial Science and Technology

  • Hiroshi Eisaki

    National Institute of Advanced Industrial Science and Technology, AIST, National Inst. Adv. Industrial Science & Technology, Tsukuba, National Institute of Advanced Industrial Science and Technology), Electronics and Photonics Research Institute National Institute of Advanced Industrial Science and Technology, Japan

  • Robert J Birgeneau

    University of California, Berkeley, Physics, University of California, Berkeley, Univ. of California, Berkeley, Physics, University of California Berkeley

  • Zhixun Shen

    Stanford University, SLAC National Accelerator Laboratory, SIMES, SLAC National Accelerator Lab, GLAM, Stanford University, Applied physics, Stanford University, Department of Applied Physics, Stanford University