Berryogenesis: self-induced Berry flux and spontaneous non-equilibrium magnetism
Abstract
Spontaneous symmetry breaking is central to the description of interacting phases of matter. Here we reveal a new mechanism through which a driven interacting system subject to a time-reversal symmetric driving field can spontaneously magnetize. We show that the 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. This non-equilibrium phase transition occurs above a critical driving amplitude, and may be of either continuous or discontinuous type. 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.
Keywords
Cite
@article{arxiv.1807.01708,
title = {Berryogenesis: self-induced Berry flux and spontaneous non-equilibrium magnetism},
author = {Mark S. Rudner and Justin C. W. Song},
journal= {arXiv preprint arXiv:1807.01708},
year = {2020}
}