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BEGIN:VEVENT
UID:69dc4e23e5bf1
DTSTAMP:20260412T220003
DTSTART:20161107T113000
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20161107T123000
URL:https://murmitoyen.com/events/vanille/udem/detail/724466-au-g-415-elect
 ric-polarization-magnetic-order-and-berry-phase-in-multiferroics-reza-nour
 afkan-udes-et-udem
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:(au G-415) Electric polarization\, magnetic order and Berry phase i
 n multiferroics - Reza Nourafkan (UdeS et UdeM)
DESCRIPTION:Exceptionnellement\, c'est au G-415 du Pavillon Roger-Gaudry
\n
 Reza Nourafkan\, département de physique\, UdeS et UdeM
\nabstract:
\nThe
  search for materials with strong magneto-electric coupling requires an un
 derstanding of intertwined magnetic and ferroelectric orders. The so-calle
 d Berry phase approach for spontaneous polarization is a single-electron t
 heory which does not allow calculation of electric polarization of correla
 tion-driven insulators. Our generalization of the Berry phase approach to 
 the case of interactions allows us to compute the electric polarization of
  a Mott insulator from first principles and to understand how the ferroele
 ctric moment at high temperature is modified by the onset of magnetic orde
 r at lower temperature.
\nReza Nourafkan is a postdoctoral researcher in t
 he groups of André-Marie Trembley at UdeS and Michel Côté at UdeM.
\n 
 
\nCette conférence est présentée par le RQMP Versant Nord du Départem
 ent de physique de l'Université de Montréal et le Département de génie
  physique de Polytechnique Montréal.
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