Berryogenesis: self-induced Berry flux and spontaneous non-equilibrium magnetism

ORAL

Abstract

Spontaneous symmetry breaking is central to the description of interacting phases of matter. In this talk I will discuss a new mechanism through which a driven interacting system subject to a time-reversal symmetric driving field can spontaneously magnetize [1]. Strong internal ac fields of a metal driven close to its plasmon resonance may enable Berryogenesis: the spontaneous generation of a self-induced Bloch band Berry flux. The self-induced Berry flux supports and is sustained by a circulating plasmonic motion, which may arise even for a linearly polarized driving field. Berryogenesis relies on feedback due to interband coherences induced by internal fields, and may readily occur in a wide variety of multiband systems. We anticipate that graphene devices, in particular, provide a natural platform to achieve Berryogenesis and plasmon-mediated spontaneous non-equilibrium magnetization in present-day devices.

[1] Mark S. Rudner and Justin C. W. Song, arXiv:1807.01708 (2018).

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Presenters

  • Mark Rudner

    Physics, University of Copenhagen, Niels Bohr International Academy, University of Copenhagen, Niels Bohr International Academy and the Center for Quantum Devices, Niels Bohr Institute, Niels Bohr Institute, Copenhagen University, Niels Bohr Institute

Authors

  • Mark Rudner

    Physics, University of Copenhagen, Niels Bohr International Academy, University of Copenhagen, Niels Bohr International Academy and the Center for Quantum Devices, Niels Bohr Institute, Niels Bohr Institute, Copenhagen University, Niels Bohr Institute

  • Justin Song

    Division of Physics and Applied Physics, Nanyang Technological University, Nanyang Technological University Singapore and Institute of High Performance Computing Singapore, Nanyang Technological University, Singapore, Nanyang Technological University