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Contrasting electron-phonon interaction between electron- and hole-doped cuprates

ORAL

Abstract

Spin- and charge-lattice interactions are potential key factors in the microscopic mechanism of high-temperature superconductivity in cuprates. Although both interactions can dramatically shape the low-energy electronic structure, their phenomenological roles in superconductivity are usually investigated independently. Employing angle-resolved photoemission spectroscopy, we reveal the spectroscopic fingerprint of short-range antiferromagnetic order in conjunction with enhanced electron-phonon interaction in the electron-doped cuprate superconductor Nd1.85Ce0.15CuO4. The observed mode coupling exhibits a strong momentum dependence that is in striking contrast to the node-antinode dichotomy previously observed in the hole-doped cuprates. Our results reveal an intimate relationship between electron-phonon coupling and antiferromagnetic fluctuations, which collectively sets the stage for unconventional superconductivity in the electron-doped cuprates.

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Presenters

  • Qinda Guo

    Stanford University

Authors

  • Qinda Guo

    Stanford University

  • Ke-Jun Xu

    Stanford University

  • Magnus Berntsen

    KTH Royal Institute of Technology

  • Antonija Grubišić-Čabo

    Zernike Institute for Advanced Materials, University of Groningen

  • Maciej Dendzik

    KTH Royal Institute of Technology

  • Balasubramanian Thiagarajan

    MAX IV Laboratory, Lund University, 22100 Lund, Sweden, MAX IV Laboratory

  • Craig Polley

    MaxIV laboratory, MAX IV Laboratory, Lund University, 22100 Lund, Sweden, MAX IV Laboratory

  • Sudi Chen

    University of California, Berkeley

  • Junfeng He

    University of Science and Technology of China

  • Yu He

    Yale University

  • Costel R. Rotundu

    Stanford University

  • Young Sang Lee

    Stanford University

  • Makoto Hashimoto

    SLAC National Accelerator Laboratory

  • Donghui Lu

    SLAC National Accelerator Laboratory

  • Dung Hai Lee

    University of California, Berkeley, University of California, University of California Berkelely

  • Thomas P Devereaux

    Stanford University

  • Zhi-Xun Shen

    Stanford University

  • Oscar Tjernberg

    KTH Royal Institute of Technology, Department of Applied Physics, KTH Royal Institute of Technology, Stockholm 11419, Sweden