Charge- and spin-polarized currents in mesoscopic rings with Rashba spin-orbit interactions coupled to an electron reservoir

M. Ellner, N. Bolívar, B. Berche, E. Medina

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

6 Citas (Scopus)

Resumen

The electronic states of a mesoscopic ring are assessed in the presence of Rashba spin-orbit (SO) coupling and a U(1) gauge field. Spin-symmetric coupling to an ideal lead is implemented following Büttiker's voltage probe. The exact density of states is derived using the reservoir uncoupled eigenstates as basis functions mixed by the reservoir coupling. The decay time of uncoupled electron eigenstates is derived by fitting the broadening profiles. Spin and charge persistent currents are computed in the presence of the SO interaction and the reservoir coupling for two distinct scenarios of the electron filling fraction. The degradation of the persistent currents depends uniformly on the reservoir coupling but nonuniformly in temperature, the latter due to the fact that currents emerge from different depths of the Fermi sea, and thus for some regimes of flux, they are provided with a protective gap. Such flux regimes can be tailored by the SO coupling for both charge and spin currents.

Idioma originalInglés
Número de artículo085305
PublicaciónPhysical Review B - Condensed Matter and Materials Physics
Volumen90
N.º8
DOI
EstadoPublicada - 12 ago. 2014
Publicado de forma externa

Huella

Profundice en los temas de investigación de 'Charge- and spin-polarized currents in mesoscopic rings with Rashba spin-orbit interactions coupled to an electron reservoir'. En conjunto forman una huella única.

Citar esto