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Controlling spin in an electronic interferometer with spin-active interfaces

Authors
  • Cottet, A.
  • Kontos, T.
  • Belzig, W.
  • Schonenberger, C.
  • Bruder, C.
Type
Published Article
Publication Date
Mar 29, 2006
Submission Date
Dec 08, 2005
Identifiers
DOI: 10.1209/epl/i2006-10006-0
arXiv ID: cond-mat/0512176
Source
arXiv
License
Unknown
External links

Abstract

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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