Seminar on Disorder and strong electron correlations:
"Enhancement of superconductivity by Anderson localization"
Starts 14 Apr 2011 12:30
Ends 14 Apr 2011 20:00
Central European Time
Leonardo da Vinci Building Luigi Stasi Seminar Room
Strada Costiera, 11
I - 34151 Trieste (Italy)
The influence of disorder on the temperature of the superconducting transition (Tc) is studied within the sigma-model renormalization group framework. The electron-electron interaction in the particle-hole and Cooper channels is taken into account and assumed to be short-range. Two-dimensional systems in the weak localization and antilocalization regime, as well as systems near the mobility edge are considered. We show that in all these regimes Anderson localization leads to a strong enhancement of Tc, which is related to the multifractal character of wavefunctions.