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TT: Fachverband Tiefe Temperaturen

TT 58: Poster Session Transport & Matter at Low Temperature

TT 58.3: Poster

Donnerstag, 14. März 2013, 15:00–19:00, Poster D

Majorana modes and localization in a disorderd Kitaev model — •Hanno Schmiedt, Lars Fritz, and Alexander Altland — Institut für theoretische Physik, Universität zu Köln, Deutschland

The periodic table of topological insulators and superconductors makes predictions about the localization properties as well as the absence or presence of gapless edge modes of systems having a certain type of symmetry. In one dimension it has been established that systems in class D exhibit protected Majorana edge modes. A microscopic realization of this system was introduced by Kitaev in terms of a simple one dimensional tight binding model. Using this lattice model we study (i) the robustness of the Majorana edge modes upon including disorder and increasing the number of parallel channels by computing the topological invariant as well as (ii) the existence or absence of extended zero energy states from the inverse participation ratio.