Exploring nonequilibrium phases of photo-doped Mott insulators with Generalized Gibbs ensembles

ORAL

Abstract

Photo-excited strongly correlated systems can exhibit intriguing non-thermal phases, but the theoretical investigation of them poses significant challenges. In this work, we introduce a generalized Gibbs ensemble type description for long-lived photo-doped states in Mott insulators. This framework enables systematic studies of photo-induced phases based on equilibrium methods, as demonstrated here for the one-dimensional extended Hubbard model. We determine the nonequi- librium phase diagram, which features η-pairing and charge density wave phases in a wide doping range, and reveal physical properties of these phases. We show that the peculiar kinematics of photo-doped carriers, and the interaction between them, play an essential role in the formation of the non-thermal phases, and we clarify the differences between photo-doped Mott insulators, chemically-doped Mott insulators and photo-doped semiconductors. Our results demonstrate a new path for the systematic exploration of nonequilibrium strongly correlated systems and show that photo-doped Mott insulators host different phases than conventional semiconductors.

*This work is supported by Grant-in-Aid for Scientific Research from JSPS, KAKENHI Grant Nos. JP19K23425 (Y. M.), JP20K14412 (Y. M.), JP20H05265 (Y. M.), JP21H05017 (Y.M.), JP21K03412 (S. T.), JST CREST Grant No. JPMJCR1901 (Y. M.) JPMJCR19T3 (Y. M. and S. T.), Slovenian Research Agency (ARRS) Grant. No. J1-2455 and P1-0044 (D. G.), and ERC Consolidator Grant No. 724103 (P. W.). A.J.M. is supported in part by Programmable Quantum Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under award DE-SC0019443. The Flatiron Insti- tute is a division of the Simons Foundation. T.K. was supported by the JSPS Overseas Research Fellowship.

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Publication: Y. Murakami, S. Takayoshi, T. Kaneko, Z. Sun, D. Golez, A. J. Millis, and P. Werner, arXiv:2105.13560 (2021).

Presenters

  • Yuta Murakami

    • Tokyo Institute of Technology

Authors

  • Yuta Murakami

    • Tokyo Institute of Technology

  • Shintaro Takayoshi

    • Konan University

  • Tatsuya Kaneko

    • Riken

  • Zhiyuan Sun

    • Columbia Univ
    • Harvard University
    • Columbia University

  • Denis Golez

    • Institut "Jožef Stefan"
    • Simons Foundation

  • Andrew J Millis

    • Columbia University
    • Columbia University; Flatiron Institute
    • Columbia University, Flatiron Institute

  • Philipp Werner

    • Fribourg University