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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1343
DTSTART:20081110T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260506T190742Z
LAST-MODIFIED:20081031T204252Z
LOCATION:5310 Chamberlin
SUMMARY:Novel Orders from Geometrical Frustration and Orbital Degenera
 cy\, R. G. Herb Condensed Matter Seminar\, Ashvin Vishwanath\, Univers
 ity of California - Berkeley
DESCRIPTION:In frustrated systems\, competing interactions lead to deg
 eneracies - which in turn produce complex phase diagrams and sometimes
  entirely new states of matter. Frustration often arises from the latt
 ice geometry\,  and a number of normally weak effects can be important
  to determining the state of the system. I will discuss how coupling t
 o phonons leads to a complex phase diagram for triangular lattice anti
 ferromagnets and how quantum fluctuations can stabilize a supersolid p
 hase\, where the system is at once both a crystal and a superfluid. Fr
 ustration can also arise from orbital degrees of freedom\, and I will 
 discuss a promising candidate for a quantum liquid state with topologi
 cal order\, in a spin-orbital model.
URL:https://www.physics.wisc.edu/events/?id=1343
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