Berlin 2012 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 44: Transport: Nanoelectronics III - Molecular Electronics 2

TT 44.6: Vortrag

Donnerstag, 29. März 2012, 16:30–16:45, BH 334

(contribution withdrawn) Spin selective transport through helical molecular systems — •Rafael Gutierrez¹, Elena Diaz², Ron Naaman³, and Gianaurelio Cuniberti¹ — ¹Institute for Materials Science, Dresden University of Technology, 01062 Dresden, Germany — ²GISC, Departamento de Fisica de Materiales, Universidad Complutense, E-28040 Madrid, Spain — ³Department of Chemical Physics, Weizmann Institute, 76100 Rehovot, Israel

Highly spin selective transport of electrons through a helically shaped electrostatic potential is demonstrated in the frame of a minimal model approach. The effect is significant even in the case of weak spin-orbit coupling. Two main factors determine the selectivity, an unconventional Rashba-like spin-orbit interaction, reflecting the helical symmetry of the system, and a weakly dispersive electronic band of the helical system. The weak electronic coupling, associated with the small dispersion, leads to a low mobility of the charges in the system and allows even weak spin-orbit interactions to be effective. The results are expected to be generic for chiral molecular systems displaying low spin-orbit coupling and low conductivity.