Extrinsic Spin Hall Effect from First Principles

Martin Gradhand*, Dmitry V. Fedorov, Peter Zahn, Ingrid Mertig

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

105 Citations (Scopus)

Abstract

We present an ab initio description of the spin Hall effect in metals. Our approach is based on density functional theory in the framework of a fully relativistic Korringa-Kohn-Rostoker method and the solution of a linearized Boltzmann equation including the scattering-in term (vertex corrections). The skew scattering mechanism at substitutional impurities is considered. Spin-orbit coupling in the host as well as at the impurity atom and the influence of spin-flip processes are fully taken into account. A sign change of the spin Hall effect in Cu and Au hosts is obtained as a function of the impurity atom, and even light elements like Li can cause a strong effect. It is shown that the gigantic spin Hall effect in Au can be caused by skew scattering at C and N impurities which are typical contaminations in a vacuum chamber.

Original languageEnglish
Article number186403
JournalPhysical Review Letters
Volume104
Issue number18
DOIs
Publication statusPublished - 7 May 2010

Keywords

  • SEMICONDUCTORS
  • RANDOM ALLOYS
  • ELECTRICAL-TRANSPORT PHENOMENA
  • QUANTUM-THEORY
  • FERROMAGNETICS

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