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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-2312
DTSTART:20111003T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T132429Z
LAST-MODIFIED:20111021T125322Z
LOCATION:5310 Chamberlin
SUMMARY:Strong coupling theory of quantum critical points in heavy fer
 mion compounds\, Condensed Matter Theory Group Seminar\, Peter Wölfle
 \, Karlsruhe Institute of Technology\, Germany
DESCRIPTION:Following a brief general introduction into quantum phase 
 transitions the case of antiferromagnetic transitions in heavy fermion
  metals is discussed. It is shown that in certain cases the effective 
 mass of fermionic quasiparticles diverges at the critical point. Using
  an extension of Landau quasiparticle theory the coupling of the criti
 cal behavior in the fermionic and bosonic sector is shown to lead to a
  new type of scaling behavior with unusual critical exponents. The the
 ory accounts well for the up to now unexplained critical behavior of Y
 bRh2Si2.
URL:https://www.physics.wisc.edu/events/?id=2312
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