Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 38: Poster Session Transport

TT 38.15: Poster

Mittwoch, 16. März 2011, 14:00–18:00, P3

Effects of spin-orbit interaction on Andreev reflection in carbon nanotubes — •Anselm Schultes and Patrik Recher — Institut für Theoretische Physik und Astrophysik, Universität Würzburg, 97074 Würzburg

We model transport through a carbon nanotube (CNT) in contact with a s-wave superconductor using the Dirac-Bogoliubov-de Gennes equation including spin-orbit interaction (SOI) in the CNT. For a transparent normal-superconductor (NS) interface the subgap conductance, which is dominated by Andreev reflection, is modified in the presence of SOI. Depending on the chirality of the CNT, transport can be spin-dependent. In a NSN junction the nonlocal conductance carried by crossed Andreev reflection and elastic co-tunneling is strongly influenced by SOI and can be manipulated by a gate voltage.