Berlin 2012 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 6: Transport: Nanoelectronics I - Quantum Dots, Wires, Point Contacts 1

TT 6.11: Talk

Monday, March 26, 2012, 12:15–12:30, BH 334

Carbon nanotubes with metallic contacts: energy and spin-orbit dependence of the tunneling rates — •Magdalena Marganska and Milena Grifoni — Institute for Theoretical Physics, University of Regensburg, 93053 Regensburg, Germany

A microscopic approach to evaluate tunneling rates between a carbon nanotube and a metallic lead is presented. We show that the magnitude of the tunneling rate not only depends on the energy of the tunneling electron, but also on specific carbon nanotube features, such as its chiral angle and size. The latter in turn determine its curvature and the strength of the spin-orbit coupling. As a consequence, we predict different tunneling rates when tunneling in or out of the spin-orbit-split doublet states.