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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3322
DTSTART:20140414T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T193605Z
LAST-MODIFIED:20140310T184858Z
LOCATION:Chamberlin 5310
SUMMARY:Evolution of the magnetic ordering in iron-chalcogenide Fe(1+y
 )Te as a function of the level of interstitial Fe excess\, y Time\, Co
 ndensed Matter Theory Group Seminar\, Samuel Ducatman\, University of 
 Wisconsin
DESCRIPTION:We studied the electronic and magnetic properties of iron-
 chalcogenide Fe$_{1+y}$Te compounds based on the multiband model\, in 
 which localized spins and itinerant electrons coexist and are coupled 
 by Hund's rule coupling. Integrating out the conduction electrons\, we
  computed additional couplings between localized spins similarly to th
 e conventional Ruderman-Kittel-Kasuya-Yosida (RKKY)theory. We found th
 at resulting RKKY-like interactions are substantial up to the third ne
 ighbors\, but are negligible beyond this. We computed the magnetic pha
 se diagram of the modified $J_1-J_2-J_3-K$ model and showed it capture
 s the evolution of the magnetic order in Fe$_{1+y}$Te as a function of
  Fe excess $y$.
URL:https://www.physics.wisc.edu/events/?id=3322
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