Spontaneous inhomogeneity in disordered superconducting films

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Presentation transcript:

Spontaneous inhomogeneity in disordered superconducting films Mikhail Skvortsov Mikhail Feigelman Landau Institute, Moscow Leiden, 26 Aug 2011

Two mechanism of superconductivity suppression

Coulomb suppression of Tc & mesoscopic fluctuations Can these tiny mesoscopic fluctuations become important?

Outline

Coulomb + disorder in 2D superconducting films

Coulomb suppression of Tc clean dirty

Two equivalent approaches (RG or not RG)

Mean-field structure of the superconducting state

Mesoscopic fluctuations PLAN

Mesoscopic fluctuations

Correlation functions

Correlation function of D

Correlation function of D

Vicinity of Tc

Vicinity of Tc

Mesoscopic vs. thermal fluctuations near Tc

Low temperatures

Superconductor with fluctuating D(r)

Superconductor with fluctuating D(r)

Conclusion FERMIONIC MECHANISM BOSONIC MECHANISM