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233. 


Spin selective transport through helical molecular systems



R. Gutierrez, E. Diaz, R. Naaman, and G. Cuniberti

Physical Review B 85, 081404(R) (2012)

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 for 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.



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doi absolute link10.1103/PhysRevB.85.081404
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online abstractarXiv preprint: 1110.0354
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