Dynamical phase transition in an optically driven 2D Heisenberg antiferromagnet

ORAL

Abstract

Recent theory results [Walldorf et al., Phys. Rev. B 100 121110 (R) (2019)], obtained in a one loop non-interacting magnon theory, demonstrate a dynamical phase transition in the antiferromagnetic phase of the 2D Hubbard model upon laser driving. The transition is characterized by a qualitative change in the magnon distribution function as the drive strength is varied. Here we investigate the effects of magnon-magnon interactions using an interacting spin-wave theory in a large spin expansion and a Boltzmann formalism. The scattering leads to qualitative changes with respect to the noninteracting results, in particular to steady states that can be characterized by a generalized Bose-Einstein distribution with an effective drive-dependent chemical potential. Implications for the dynamical phase transition and the Mermin-Wagner theorem for nonthermal states are discussed.

*DFG Emmy Noether prog. SE 2558/2-1, the Max Planck NY Center for Nonequilibrium Quantum Phenomena, the US DOE, Office of BES, Division of Materials Sciences and Engineering Grant No. DE SC0012375

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Presenters

  • Mona Kalthoff

    • Max Planck Institute for the Structure and Dynamics of Matter

Authors

  • Mona Kalthoff

    • Max Planck Institute for the Structure and Dynamics of Matter

  • Dante Kennes

    • Institut fur Theorie der Statistischen Physik, RWTH Aachen
    • RWTH Aachen University
    • Institut für Theorie der Statistischen Physik, RWTH Aachen University
    • Institute for Theory of Statistical Physics, Aachen University
    • RWTH Aachen
    • Aachen
    • Institute for Theory of Statistical Physics, RWTH Aachen University

  • Andrew Millis

    • Columbia University
    • Department of Physics, Columbia University
    • Flatiron Institute
    • Columbia Univ
    • Center for Computational Quantum Physics, Flatiron Institute
    • Flatiron Institute; Columbia Univ.
    • Columbia University and Center for Computational Quantum Physics, Flatiron Institute

  • Michael Sentef

    • Max Planck Inst Structure & Dynamics of Matter
    • theory department, Max Planck Institute for the Structure and Dynamics of Matter
    • Theory, Max Planck Institute for the Structure and Dynamics of Matter
    • Max Planck Institute for the Structure and Dynamics of Matter
    • Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany