Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 51: TR: Nanoelectronics I - Quantum Dots, Wires, Point Contacts 2

TT 51.2: Vortrag

Donnerstag, 17. März 2011, 14:15–14:30, HSZ 304

Spin current polarization due to spin orbit interaction in carbon nanotubes — •Miriam del Valle, Magdalena Margańska, and Milena Grifoni — Institute for Theoretical Physics, University of Regensburg, Germany

Finite carbon nanotubes placed in a magnetic field parallel to their axes develop localized states and an associated suppression of current. The current is completely blocked for magnetic fields beyond a certain value which depends on the length and chirality of the tube. We will focus on the interplay of this blocking mechanism with the spin orbit interaction and the Zeeman effect. We observe in particular reversible spin polarization of the current, controlled by the bias applied to the tube. The analytical results are supported by numerical simulations for different lengths and chiralities.