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Band structure motif and bosonic excitations in the fluctuating superconductivity of overdoped cuprates

ORAL

Abstract

Superconducting fluctuation is one of the central discussions in the physics of high-Tc superconductivity, especially when the system is optimally doped. Recent years have seen a renewed interest in this topic regarding overdoped cuprates, where the expectation is to seek a resolution closer to various BCS premises. However, a series of transport and optical experiments reveal substantial departure from the conventional wisdom.

We combine angle-resolved photoemission spectroscopy (ARPES) with inelastic neutron scattering (INS), and aim to provide a holistic view on this issue on overdoped single crystal Bi-2212. In particular, we discuss the role of the van Hove point on the electronic structure and the partial flat band around it [1]. The relation between electronic structure and the underlying magnetic excitation will also be discussed in the context of d-wave pairing and pair-breaking [2].

[1] Science 362, 62 (2018)
[2] Phys. Rev. Lett. 121, 057002 (2018)

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Presenters

  • Yu He

    Physics, University of California at Berkeley

Authors

  • Yu He

    Physics, University of California at Berkeley

  • Su-Di Chen

    Stanford University, Applied Physics, Stanford University, SLAC National Accelerator Laboratory, Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford Univ

  • Makoto Hashimoto

    SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource, Stanford Synchrotron Radiation Lightsource, SSRL, SLAC National Laboratory, SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory

  • Shan Wu

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

  • Xiang Chen

    Lawrence Berkeley National Laboratory, Physics, University of California at Berkeley, University of California, Santa Barbara

  • Yu Song

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

  • Hiroshi Eisaki

    AIST, Japan, National Institute of Advanced Industrial Science and Technology, The National Institute of Advanced Industrial Science and Technology, National Institute of Advanced Industrial Science and Technology, Japan

  • Zhixun Shen

    Standford, Stanford University, Stanford Univeristy, Applied Physics, Stanford University, SLAC National Accelerator Laboratory, Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA, Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, SIMES, SLAC - Natl Accelerator Lab, Stanford Univ

  • Robert J Birgeneau

    University of California, Berkeley, Physics, University of California at Berkeley, Physics, University of California, Berkeley, Department of Physics, University of California, Berkeley