Modeling spin transport in helical fields: Derivation of an effective low-dimensional hamiltonian
Gutierrez R, Diaz E, Gaul C, Brumme T, Dominguez-Adame F, Cuniberti G (2013)
Publication Type: Journal article
Publication year: 2013
Journal
Book Volume: 117
Pages Range: 22276-22284
Journal Issue: 43
DOI: 10.1021/jp401705x
Abstract
This study is devoted to a consistent derivation of an effective model Hamiltonian to describe spin transport along a helical pathway and in the presence of spin-orbit interaction, the latter being induced by an external field with helical symmetry. It is found that a sizable spin polarization of an unpolarized incoming state can be obtained without introducing phase breaking processes. For this, at least two energy levels per lattice site in the tight-binding representation are needed. Additionally, asymmetries in the effective electronic-coupling parameters as well as in the spin-orbit interaction strength must be present to achieve net polarization. For a fully symmetric system - in terms of electronic and spin-orbit couplings - no spin polarization is found. The model presented is quite general and is expected to be of interest for the treatment of spin-dependent effects in molecular scale systems with helical symmetry. © 2013 American Chemical Society.
Involved external institutions
Germany (DE)
Spain (ES)How to cite
APA:
Gutierrez, R., Diaz, E., Gaul, C., Brumme, T., Dominguez-Adame, F., & Cuniberti, G. (2013). Modeling spin transport in helical fields: Derivation of an effective low-dimensional hamiltonian. Journal of Physical Chemistry C, 117(43), 22276-22284. https://doi.org/10.1021/jp401705x
MLA:
Gutierrez, Rafael, et al. "Modeling spin transport in helical fields: Derivation of an effective low-dimensional hamiltonian." Journal of Physical Chemistry C 117.43 (2013): 22276-22284.
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