Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 25: Correlated Electrons: Quantum-Critical Phenomena 1

TT 25.2: Talk

Wednesday, March 28, 2012, 09:45–10:00, H 3010

Usadel equation approach to fluctuation conductivity in disordered superconductors — Konstantin Tikhonov^1,2, •Georg Schwiete³, and Alexander Finkelstein^1,4 — ¹Texas A&M University, College Station, Texas, USA — ²Landau Institute for Theoretical Physics, Moskow, Russia — ³Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, Germany — ⁴The Weizmann Institute of Science, Rehovot, Israel

We study fluctuation corrections to the longitudinal and transverse conductivities in disordered superconducting films. The calculation covers a broad range of perpendicular magnetic fields and temperatures, including the vicinity of the magnetic field-tuned quantum critical point. Our calculation scheme is based on the Usadel equation, which we adjust to account for the fluctuating order parameter field.