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2015 | 127 | 2 | 457-459
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Spin Hall and Edelstein Effects in Metallic Films

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In an insulator-metal-insulator junction, inversion-symmetry breaking at the interfaces between the 3D metallic film and the top and bottom insulating layers may give rise to a sizeable (Rashba-like) spin-orbit interaction. In this paper we study the spin Hall and Edelstein effects produced by such an interface interaction through a quasiclassical approach. We find that the spin Hall conductivity has a finite value even if spin-orbit interaction with impurities in the bulk of the metallic film is neglected and disorder is properly taken into account. This is in sharp contrast with the case of a strictly 2D metallic layer, in which case impurity scattering is known to completely suppress Rashba-like contributions to the spin Hall conductivity. The non-vanishing of the latter has a profound influence on the Edelstein effect, which we show to consist of two terms, the first with the standard form valid in an exactly 2D system, and a second arising from the presence of the third dimension.
  • Dipartimento di Matematica e Fisica, Università Roma Tre, Via della Vasca Navale 84, Rome, Italy
  • Service de Physique de l'État Condensé, CNRS URA 2464, CEA Saclay, F-91191 Gif-sur-Yvette, France
  • Department of Physics and Astronomy, University of Missouri, Columbia MO 65211, USA
  • Dipartimento di Matematica e Fisica, Università Roma Tre, Via della Vasca Navale 84, Rome, Italy
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