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Quantitative assessment of the universal thermopower in the Hubbard model

Author

Listed:
  • Wen O. Wang

    (Stanford University
    SLAC National Accelerator Laboratory)

  • Jixun K. Ding

    (Stanford University
    SLAC National Accelerator Laboratory)

  • Edwin W. Huang

    (University of Illinois at Urbana-Champaign
    University of Notre Dame
    University of Notre Dame)

  • Brian Moritz

    (SLAC National Accelerator Laboratory)

  • Thomas P. Devereaux

    (SLAC National Accelerator Laboratory
    Stanford University
    Stanford University)

Abstract

As primarily an electronic observable, the room-temperature thermopower S in cuprates provides possibilities for a quantitative assessment of the Hubbard model. Using determinant quantum Monte Carlo, we demonstrate agreement between Hubbard model calculations and experimentally measured room-temperature S across multiple cuprate families, both qualitatively in terms of the doping dependence and quantitatively in terms of magnitude. We observe an upturn in S with decreasing temperatures, which possesses a slope comparable to that observed experimentally in cuprates. From our calculations, the doping at which S changes sign occurs in close proximity to a vanishing temperature dependence of the chemical potential at fixed density. Our results emphasize the importance of interaction effects in the systematic assessment of the thermopower S in cuprates.

Suggested Citation

  • Wen O. Wang & Jixun K. Ding & Edwin W. Huang & Brian Moritz & Thomas P. Devereaux, 2023. "Quantitative assessment of the universal thermopower in the Hubbard model," Nature Communications, Nature, vol. 14(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42772-8
    DOI: 10.1038/s41467-023-42772-8
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    References listed on IDEAS

    as
    1. Ta Tang & Brian Moritz & Cheng Peng & Zhi-Xun Shen & Thomas P. Devereaux, 2023. "Traces of electron-phonon coupling in one-dimensional cuprates," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
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