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VERSION:2.0
PRODID:icalendar-ruby
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BEGIN:VEVENT
DTSTAMP:20260719T222635Z
UID:https://www.mpsd.mpg.de/events/18814/2724
DTSTART:20190522T080000Z
DTEND:20190522T093000Z
CLASS:PUBLIC
CREATED:20190521T085223Z
DESCRIPTION: Historically charge density waves have been associated with th
 e notions of Fermi surface nesting and\, at the transition temperature\, a
  soft phonon mode. In this talk\, I will present two cases that defy this 
 common theme. First\, I will show that TiSe2 undergoes a transition due to
  exciton condensation\, which exhibits a soft mode of a different\, electr
 onic variety. Second\, when driving the system away from equilibrium\, the
  phase transition is mediated by topological defects. These defects allow 
 for the formation of a charge density wave that does not occur in equilibr
 ium. This light-induced charge density wave shows some unique properties t
 hat suggest that it is not just a trivial extension of an equilibrium one.
 \nVortragende(r): Anshul Kogar
LAST-MODIFIED:20190521T085223Z
LOCATION:CFEL (Bldg. 99)\, Raum: Seminar Room IV\, O1.111
ORGANIZER;CN=Andrea Cavalleri:mailto:
SUMMARY:MPSD Seminar:  Unconventional Charge Density Wave Transitions 
URL;VALUE=URI:https://www.mpsd.mpg.de/events/18814/2724
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