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      Spin splitter regime of a mesoscopic Rashba ring

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      Author
      Moldoveanu, V.
      Tanatar, Bilal
      Date
      2010
      Source Title
      Physics Letters, Section A : General, Atomic and Solid State Physics
       
      Physics Letters A
       
      Print ISSN
      0375-9601
      Publisher
      The American Physical Society
      Volume
      375
      Issue
      2
      Pages
      187 - 191
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Using the non-equilibrium Greens' function formalism we calculate the spin currents in a one-dimensional ring coupled to three leads and in the presence of perpendicular magnetic flux Φ and Rashba spin-orbit coupling. A finite bias is applied between the input lead and the other two output leads. We show that the spin-orbit coupling allows one to operate this system as a spin splitter, i.e. the output leads deliver spin-polarized currents with different orientations. We find that the spin splitter operation can be tuned at integer multiples of Φ/Φ0. Its efficiency depends not only on the value of the Rashba coupling but also on the bias applied between the input and output leads. The selected spin orientation of the output leads can be reversed by a slight change of their contact position. We discuss as well the connection between the spin splitter operation and the spectral properties of the ring.
      Keywords
      Mesoscopic rings
      Rashba spin-orbit interaction
      Spin splitters
      Permalink
      http://hdl.handle.net/11693/22111
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.physleta.20http://dx.doi.org/10.10.047
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