Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 108: Topological Superconductors
TT 108.6: Vortrag
Freitag, 16. März 2018, 11:00–11:15, H 2053
Hybrid structures of topological insulators and superconductors - a possible realization of Cooper pair splitting? — •Jacob Fuchs1, Michael Barth1, Raphael Kozlovsky1, Cosimo Gorini1, Inanc Adagideli2, and Klaus Richter1 — 1Institut für Theoretische Physik, Universität Regensburg — 2Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul
Transport in hybrid structures of topological insulator (TI) nanowires and superconductors (SCs) is investigated. The main focus is on TI-SC-TI-like structures and the question how such devices can be used to split Cooper pairs into two spatially separated electrons. On the one hand, the utilization of the spin-momentum locking in combination with the spin-singlet nature of the Cooper pairs is discussed. On the other hand, magnetic fields parallel to the TI nanowire can cause vortices in the SC leading to Majorana modes at the TI-SC boundary. These enable the splitting of Cooper pairs. Using a T-shaped junction, the splitting can be observed via a negative differential resistance.