RT Journal Article
T1 Spin-polarized currents in corrugated graphene nanoribbons
A1 Santos, Hernán
A1 Latgé, A.
A1 Brey, L.
A1 Chico Gómez, Leonor María
AB We investigate the production of spin-polarized currents in corrugated graphene nanoribbons. Such corrugations are modeled as multiple regions with Rashba spin-orbit interactions, where concave and convex curvatures are treated as Rashba regions with opposite signs. Numerical examples for different separated Rashba-zone geometries calculated within the tight-binding approximation are provided. Remarkably, the spin-polarized current in a system with several Rashba areas can be enhanced with respect to the case with a single Rashba part of the same total area. The enhancement is larger for configurations with multiple regions with the same Rashba sign. This indicates that the increase of the spin polarization is due to the scattering of the electrons traversing regions with and without Rashba interaction. Additionally, we relate the appearance of the spin-polarized currents to novel symmetry relations between the spin-dependent conductances. These symmetries turn out to be a combination of different symmetry operations in real and spin spaces, as those occurring in non-planar systems like carbon nanotubes. Our results show that two-dimensional devices with Rashba spin-orbit interaction can be used as excellent spintronic devices in an all-electrical or mechanical setup.
SN 0008-6223
YR 2020
FD 2020-10
LK https://hdl.handle.net/20.500.14352/130992
UL https://hdl.handle.net/20.500.14352/130992
LA eng
NO Santos, H., Latgé, A., Brey, L., & Chico, L. (2020). Spin-polarized currents in corrugated graphene nanoribbons. Carbon, 168, 1-11.
NO ©Elsevier
NO Coordinación de Perfeccionamiento del Personal de Educación Superior (Brasil)
NO Consejo Nacional de Desarrollo Científico y Tecnológico (Brasil)
NO Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro
NO Comunidad de Madrid (España)
NO Ministerio de Economía, Comercio y Empresa (España)
NO Unión Europea
DS Docta Complutense
RD 13 abr 2026