Spin selective transport through helical molecular systems
Physical Review B: Rapid Communications 85, 081404 (2012).
R. Gutierrez, E. Díaz, R. Naaman, and G. Cuniberti.
Journal DOI: https://doi.org/10.1103/PhysRevB.85.081404

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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©10.1103/PhysRevB.85.081404
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Spin selective transport through helical molecular systems
Physical Review B: Rapid Communications 85, 081404 (2012).
R. Gutierrez, E. Díaz, R. Naaman, and G. Cuniberti.
Journal DOI: https://doi.org/10.1103/PhysRevB.85.081404

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.


Cover
©10.1103/PhysRevB.85.081404
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Involved Scientists