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- W2777952809 abstract "By modelling a Rashba nanowire contacted to leads via an inhomogeneous spin-orbit coupling profile, we investigate the equilibrium properties of the spin sector when a uniform magnetic field is applied along the nanowire axis. We find that a pure spin current, polarised perpendicularly to the applied field, flows through the nanowire even at equilibrium, as a result of the interplay between magnetic field and Rashba coupling. In the nanowire bulk such effect persists far beyond the regime where the nanowire mimics the helical states of a quantum spin Hall system, while in the leads the spin current is suppressed. Furthermore, at the nanowire/lead interfaces, we predict the appearance of localized spin torque and spin polarization, which are orthogonal to the magnetic field and partially penetrate into the leads via a spin-proximity effect induced by the nanowire. Finally, when the magnetic field has a component also along the Rashba effective field, its collinearity with the spin polarization and its orthogonality to the spin current polarization are violated in the nanowire bulk as well. We analyze the dependence of these quantities on the magnetic field and chemical potential, for both long and short nanowires, in experimentally realistic regimes." @default.
- W2777952809 created "2018-01-05" @default.
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- W2777952809 date "2017-12-20" @default.
- W2777952809 modified "2023-09-26" @default.
- W2777952809 title "Effects of a magnetic field on a nanowire with inhomogeneous Rashba spin-orbit coupling: spin properties at equilibrium" @default.
- W2777952809 hasPublicationYear "2017" @default.
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