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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1821
DTSTART:20100506T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260403T231127Z
LAST-MODIFIED:20100430T204308Z
LOCATION:5310 Chamberlin
SUMMARY:Kondo Physics at the Nanoscale: From Kondo Droplets to Kondo H
 oles\, R. G. Herb Condensed Matter Seminar\, Dirk Morr\, University of
  Illinois-Chicago
DESCRIPTION:Recent experimental advances have made it possible to stud
 y the Kondo effect in nanoscale structures. These achievements have op
 ened unprecedented opportunities not only for manipulating the Kondo e
 ffect at the atomic level\, but also for studying how Kondo screening 
 and coherence evolve on different length scales from a single Kondo im
 purity to the Kondo lattice. In this talk\, I show how this evolution 
 can be studied in Kondo droplets\, consisting of tens to hundreds of m
 agnetic atoms arranged in a well defined geometry. In such Kondo nanos
 tructures\, it is possible to manipulate the competition between Kondo
  screening and magnetic coupling via changes in the droplet's geometry
  and size. Moreover\, I will show how defects in Kondo lattice systems
  (i.e.\, heavy fermion materials) can unveil their complex electronic 
 and magnetic correlations in real space. The strongly correlated natur
 e of these materials lead to highly non-linear feedback effects betwee
 n defects that can drive the system to a novel\, inhomogeneous ground 
 state via a first order phase transition.
URL:https://www.physics.wisc.edu/events/?id=1821
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