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Monte Carlo study of the pseudogap and superconductivity emerging from quantum magnetic fluctuations

Author

Listed:
  • Weilun Jiang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yuzhi Liu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Avraham Klein

    (Ariel University)

  • Yuxuan Wang

    (University of Florida)

  • Kai Sun

    (University of Michigan)

  • Andrey V. Chubukov

    (University of Minnesota)

  • Zi Yang Meng

    (Chinese Academy of Sciences
    The University of Hong Kong)

Abstract

The origin of the pseudogap behavior, found in many high-Tc superconductors, remains one of the greatest puzzles in condensed matter physics. One possible mechanism is fermionic incoherence, which near a quantum critical point allows pair formation but suppresses superconductivity. Employing quantum Monte Carlo simulations of a model of itinerant fermions coupled to ferromagnetic spin fluctuations, represented by a quantum rotor, we report numerical evidence of pseudogap behavior, emerging from pairing fluctuations in a quantum-critical non-Fermi liquid. Specifically, we observe enhanced pairing fluctuations and a partial gap opening in the fermionic spectrum. However, the system remains non-superconducting until reaching a much lower temperature. In the pseudogap regime the system displays a “gap-filling" rather than “gap-closing" behavior, similar to the one observed in cuprate superconductors. Our results present direct evidence of the pseudogap state, driven by superconducting fluctuations.

Suggested Citation

  • Weilun Jiang & Yuzhi Liu & Avraham Klein & Yuxuan Wang & Kai Sun & Andrey V. Chubukov & Zi Yang Meng, 2022. "Monte Carlo study of the pseudogap and superconductivity emerging from quantum magnetic fluctuations," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-30302-x
    DOI: 10.1038/s41467-022-30302-x
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    References listed on IDEAS

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    1. Myungchul Oh & Kevin P. Nuckolls & Dillon Wong & Ryan L. Lee & Xiaomeng Liu & Kenji Watanabe & Takashi Taniguchi & Ali Yazdani, 2021. "Evidence for unconventional superconductivity in twisted bilayer graphene," Nature, Nature, vol. 600(7888), pages 240-245, December.
    2. B. Keimer & S. A. Kivelson & M. R. Norman & S. Uchida & J. Zaanen, 2015. "From quantum matter to high-temperature superconductivity in copper oxides," Nature, Nature, vol. 518(7538), pages 179-186, February.
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    Cited by:

    1. Zheng Yan & Zi Yang Meng, 2023. "Unlocking the general relationship between energy and entanglement spectra via the wormhole effect," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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