Ballistic Spin Injection from Fe(001) into ZnSe and GaAs

O. Wunnicke; Ph. Mavropoulos; R. Zeller; P. H. Dederichs; D. Grundler

doi:10.1103/PhysRevB.65.241306

Ballistic Spin Injection from Fe(001) into ZnSe and GaAs

Condensed Matter 2009-11-07 v1

Authors: O. Wunnicke , Ph. Mavropoulos , R. Zeller , P. H. Dederichs , D. Grundler

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Abstract

We consider the spin injection from Fe into ZnSe and GaAs in the ballistic limit. By means of the ab initio SKKR method we calculate the ground state properties of epitaxial Fe|ZnSe(001) and Fe|GaAs(001) heterostructures. Three injection processes are considered: injection of hot electrons and injection of "thermal" electrons with and without an interface barrier. The calculation of the conductance by the Landauer formula shows, that these interfaces act like a nearly ideal spin filter, with spin polarization as high as 99%. This can be traced back to the symmetry of the band structure of Fe for normal incidence.

Keywords

spin injection ballistic transport Fe/ZnSe heterostructure Fe/GaAs heterostructure ab initio calculation spin filter

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@article{arxiv.cond-mat/0201280,
  title  = {Ballistic Spin Injection from Fe(001) into ZnSe and GaAs},
  author = {O. Wunnicke and Ph. Mavropoulos and R. Zeller and P. H. Dederichs and D. Grundler},
  journal= {arXiv preprint arXiv:cond-mat/0201280},
  year   = {2009}
}

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4 pages, 3 figures

Ballistic Spin Injection from Fe(001) into ZnSe and GaAs

Abstract

Keywords

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