Coherent spin dynamics in a helical arrangement of molecular dipoles
Diaz E, Gutierrez R, Gaul C, Cuniberti G, Dominguez-Adame F (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 4
Pages Range: 1052-1061
Journal Issue: 5
DOI: 10.3934/matersci.2017.5.1052
Abstract
Experiments on electron transport through helical molecules have demonstrated the appearance of high spin selectivity, in spite of the rather weak spin-orbit coupling in organic compounds. Theoretical models usually rely on different mechanisms to explain these experiments, such as large spin-orbit coupling, quantum dephasing, the role of metallic contacts, or the interplay between a helicity-induced spin-orbit coupling and a strong dipole electric field. In this work we consider the coherent electron dynamics in the electric field created by the helical arrangement of dipoles of the molecule backbone, giving rise to an effective spin-orbit coupling. We calculate the spin projection onto the helical axis as a figure of merit for the assessment of the spin dynamics in a very long helical molecule. We prove that the spin projection reaches a steady state regime after a short transient. We compare its asymptotic value for different initial conditions, aiming to better understand the origin of the spin selectivity found in experiments.
Involved external institutions
Spain (ES)
Germany (DE)How to cite
APA:
Diaz, E., Gutierrez, R., Gaul, C., Cuniberti, G., & Dominguez-Adame, F. (2017). Coherent spin dynamics in a helical arrangement of molecular dipoles. AIMS Materials Science, 4(5), 1052-1061. https://doi.org/10.3934/matersci.2017.5.1052
MLA:
Diaz, Elena, et al. "Coherent spin dynamics in a helical arrangement of molecular dipoles." AIMS Materials Science 4.5 (2017): 1052-1061.
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