On the Electron Pairing Mechanism of Copper-Oxide High Temperature Superconductivity.

ORAL

Abstract

Hole doping the CuO2 plane generates the transition from a charge-transfer superexchange mediated antiferromagnetic insulator, to a high temperature superconducting state whose electron-pairing is exceptional. A leading proposal for the mechanism of this intense electron-pairing is that hole doping destroys magnetic order, but preserves superexchange interactions with a charge-transfer energy scale ε. In Bi2Sr2CaCu2O8+x, we use both single-particle and electron-pair (Josephson) STM to visualize ε and the electron-pair density np. We determine their responses to the modulations in the distance δ between planar Cu and apical O atoms. The responses we determine of ε and np to δ, and crucially of np to ε conform closely to strong-coupling theories in which charge-transfer superexchange is the electron-pairing mechanism (arXiv:2108.03655).

*M.H.H, X.L., Y.X.C., and J.C.S.D acknowledge support from the Moore Foundation n’s EPiQS Initiative through Grant GBMF9457. S.O’M and J.C.S.D. acknowledge support from Science Foundation of Ireland under Award SFI 17/RP/5445. W.C. and J.C.S.D. acknowledge support from the Royal Society under Award R64897. W.R. and J.C.S.D. acknowledge support from the European Research Council (ERC) under Award DLV-788932.

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Publication: SM O'Mahony, Wangping Ren, Weijiong Chen, Yi Xue Chong, Xiaolong Liu, H Eisaki, S Uchida, MH Hamidian, JC Davis, "On the Electron Pairing Mechanism of Copper-Oxide High Temperature Superconductivity", arXiv preprint arXiv:2108.03655. (2020)

Presenters

  • Shane O'Mahony

    • University College Cork

Authors

  • Shane O'Mahony

    • University College Cork

  • Wangping Ren

    • University of Oxford

  • Weijiong Chen

    • University of Oxford

  • Yi Xue Chong

    • Cornell University

  • Xiaolong Liu

    • Cornell University

  • H Eisaki

    • 5. Inst. of Advanced Industrial Science and Tech., Tsukuba, Ibaraki 305-8568, Japan
    • lectronics and Photonics Research Institute,10National Institute of Advanced Industrial Science11and Technology, Tsukuba, Ibaraki 305-8568, Japan
    • Inst. of Advanced Industrial Science and Tech, Japan

  • Shin-ichi Uchida

    • Univ of Tokyo

  • Mohammad Hamidian

    • Cornell University

  • JC S Davis

    • University of Oxford, University College Cork
    • University of Oxford; Cornell University; University College Cork; Max-Planck Institute for Chemical Physics of Solids
    • University of Oxford