Mardi 11 décembre 2012 à 10h15
Salle Datcha,

Polarons: from models to materials to quantum simulation

Vladimir M. Stojanovic, University of Basel

I will start with a brief introduction on the common electron-phonon coupling mechanisms that may bring about polaronic behavior, focusing on the conditions for the existence of small polarons. In the second part of the talk, an example of a nonanalytic behaviour resulting from Peierls-type (SSH) electron-phonon coupling will be presented, thus breaking the long-held belief that polaron models never show sharp transitions. To illustrate the notion that polaronic carriers are not so commonly found in real materials, the results will be presented of a recent study in which we showed that