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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1708
DTSTART:20100401T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T161501Z
LAST-MODIFIED:20100322T182954Z
LOCATION:5310 Chamberlin
SUMMARY:Electronic Orbital Currents and Polarization in Mott Insulator
 s\, R. G. Herb Condensed Matter Seminar\, Cristian Batista\, Los Alamo
 s National Laboratory
DESCRIPTION:Mott insulators are one of the most important classes of m
 aterials in modern solid-state physics. I will show that geometrically
  frustrated Mott insulators can exhibit unexpected charge effects like
  spontaneous circular electric currents that result from certain (scal
 ar) chiral spin orderings or non-uniform electronic charge distributio
 ns associated with a subclass of bond orderings. We will see how these
  phases can appear in simple Hubbard models. In addition\, I will show
  how these low-energy spin states contribute comparably to the dielect
 ric and magnetic response functions\, leading to interesting phenomena
  such as dipole-active ESR transitions\, rotation the electric field p
 olarization\, and magneto-electric effects. 
URL:https://www.physics.wisc.edu/events/?id=1708
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