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SUMMARY:Polarons: from models to materials to quantum simulation - Vladimi
 r M. Stojanovic\, University of Basel
DTSTART:20121115T141500Z
DTEND:20121115T151500Z
UID:TALK39529@talks.cam.ac.uk
CONTACT:Dr G Moller
DESCRIPTION:I will start with a brief introduction on the common electron-
 phonon\ncoupling mechanisms that may bring about polaronic behavior\, focu
 sing on the\nconditions for the existence of small polarons. In the second
  part of the talk\, an example of a nonanalytic behaviour resulting from P
 eierls-type (SSH)\nelectron-phonon coupling will be presented\, thus break
 ing the long-held belief that polaron models never show sharp transitions.
  To illustrate the notion that polaronic carriers are not so commonly foun
 d in real materials\, the results will be presented of a recent study in w
 hich we showed that -- contrary to what is often assumed -- charge carrier
 s in crystalline organic semiconductors are not polarons. Finally\, I will
  discuss some basic aspects of our recently proposed quantum simulation of
  small Holstein polaron formation using\ntrapped ions.
LOCATION:TCM Seminar Room\, Cavendish Laboratory
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