Hubbard exciton fluids in Mott antiferromagnets

ORAL

Abstract

Antiferromagnetic correlations in Mott insulators are predicted to enhance the attractive interactions between holons and doublons, leading to the formation of a bound state known as a Hubbard exciton. However, experimental evidence for Hubbard excitons and their magnetic binding mechanism remain sparse. In this talk, I will discuss recent ultrafast time-resolved time-domain THz spectroscopy measurements directed at searching for signatures of intra-excitonic transitions in Mott antiferromagnets. These measurements reveal the ultrafast formation of a transient Hubbard excitonic fluid in several Mott insulating compounds. The effects of magnetic ordering on these fluids will be discussed.

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Publication: Mehio, O., Li, X., Ning, H. et al. A Hubbard exciton fluid in a photo-doped antiferromagnetic Mott insulator. Nat. Phys. (2023). https://doi.org/10.1038/s41567-023-02204-2

Presenters

  • Omar Mehio

    • Cornell

Authors

  • Omar Mehio

    • Cornell

  • Xinwei Li

    • California Institute of Technology
    • Dept. of Physics, California Institute of Technology
    • Rice University

  • Honglie Ning

    • Massachusetts Institute of Technology

  • Honglie Ning

    • Massachusetts Institute of Technology

  • Yuchen Han

    • Caltech

  • Zala Lenarčič

    • JSI

  • Michael Buchhold

    • Caltech

  • Michael Buchhold

    • Caltech

  • Zachary Porter

    • University of California, Santa Barbara

  • Stephen D Wilson

    • University of California, Santa Barbara

  • David Hsieh

    • California Institute of Technology
    • Dept. of Physics, California Institute of Technology