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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.52: Poster

Friday, March 4, 2005, 14:00–18:00, Poster TU C

Phase relaxation by a fluctuating gauge field — •Thomas Ludwig¹ and Alexander D. Mirlin^1,2 — ¹Institut für Nanotechnologie, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany — ²Institut für Theorie der Kondensierten Materie, Universität Karlsruhe, 76128 Karlsruhe, Germany

We investigate the effect of transverse gauge field fluctuations on the transport properties of a disordered electron system. In particular, we show that very slow fluctuations with frequencies smaller than the inverse dephasing time play an important role in suppressing the amplitude of mesoscopic conductance fluctuations. This is due to ensemble averaging by the measurement if the duration of the measurement is the longest time scale of the system. We also highlight the close connection between mesoscopic conductance fluctuations and weak localization.