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SUMMARY:Spontaneous non-equilibrium magnetism via &quot\;Berryogenesis&quo
 t\; in driven electronic systems - Prof. Mark Spencer Rudner\, Niels Bohr 
 Institute\, University of Copenhagen
DTSTART:20190425T131500Z
DTEND:20190425T141500Z
UID:TALK113440@talks.cam.ac.uk
CONTACT:Katarzyna Macieszczak
DESCRIPTION:Spontaneous symmetry breaking is central to the description of
  interacting phases of matter. In this talk I will discuss a novel type of
  collective mode symmetry breaking transition in which a driven interactin
 g system subject to a time-reversal symmetric driving field can spontaneou
 sly magnetize. Strong internal ac fields of a metal driven close to its pl
 asmon resonance may enable Berryogenesis: the spontaneous generation of a 
 self-induced Bloch band Berry flux. The self-induced Berry flux supports a
 nd is sustained by a circulating plasmonic motion\, which may arise even f
 or a linearly polarized driving field.  Berryogenesis relies on feedback d
 ue to interband coherences induced by internal fields\, and may readily oc
 cur in a wide variety of multiband systems. We anticipate that graphene de
 vices\, in particular\, provide a natural platform to achieve Berryogenesi
 s and plasmon-mediated spontaneous non-equilibrium magnetism with present-
 day capabilities.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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