Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 12: Transport: Nanoelectronics I - Quantum Dots, Wires, Point Contacts 2

TT 12.2: Vortrag

Montag, 26. März 2012, 15:15–15:30, BH 334

Nanotransformation and current fluctuations in exciton-condensate junctions — •Henning Soller and Andreas Komnik — Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, D-69120 Heidelberg

We analyse the transport properties of a bilayer exciton condensate that is contacted by four metallic leads. Using a generic model for the exciton condensate we derive the exact full counting statistics, which allows for the calculation of the nonlinear current-voltage characteristics as well as noise and cross correlations. Despite some similarities to other contacted condensates such as superconductors several features specifically show the properties of the correlated electron-hole exciton states. In particular these can be exploited when contacting the exciton condensate to another mesoscopic system (in our case a quantum point contact) which allows for transforming current on the nanoscale.