Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 13: Transport: Poster Session

TT 13.21: Poster

Montag, 26. März 2012, 15:00–19:00, Poster B

Weak localization and magnetoresistance in two-chain ladder models — •Michael P. Schneider, Sam T. Carr, Igor V. Gornyi, and Alexander D. Mirlin — Institut für Theorie der kondensierten Materie, KIT, D-76128 Karlsruhe

We study the weak localization correction to the conductivity of a disordered two-chain ladder in the limit of strong dephasing, paying particular attention to magnetoresistance. We observe an anomalous behaviour of the magnetoresistance in a specific range of parameters, due to a competition between an interference effect and the dimensionality of the system, and predict the curious phenomenon of magnetic field enhanced localization.