Controlling spin in an electronic interferometer with spin-active interfaces

Details Controlling spin in an electronic interferometer with spin-active interfaces Controlling spin in an electronic interferometer with spin-active interfaces

2005-12-08

arxiv.org/abs/cond-mat/0512176v2

Europhys. Lett. 74, 320 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures. to be published in Europhysics Letters

Scientific paper

10.1209/epl/i2006-10006-0

We consider electronic current transport through a ballistic one-dimensional quantum wire connected to two ferromagnetic leads. We study the effects of the spin-dependence of interfacial phase shifts (SDIPS) acquired by electrons upon scattering at the boundaries of the wire. The SDIPS produces a spin splitting of the wire resonant energies which is tunable with the gate voltage and the angle between the ferromagnetic polarizations. This property could be used for manipulating spins. In particular, it leads to a giant magnetoresistance effect with a sign tunable with the gate voltage and the magnetic field applied to the wire.

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