Orbital magnetic moment and extrinsic spin Hall effect for iron impurities in gold

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Autor/in:
Erscheinungsjahr:
2011
Medientyp:
Text
Schlagworte:
  • Hall effect
  • Spin Hall effect
  • Longitudinal resistivity
  • Magnetic Anisotropy
  • Magnetization
  • Magnetism
  • Hall effect
  • Spin Hall effect
  • Longitudinal resistivity
  • Magnetic Anisotropy
  • Magnetization
  • Magnetism
Beschreibung:
  • We report electronic structure calculations of an iron impurity in a gold host. The spin, orbital, and dipole magnetic moments were investigated using the local density approximation (LDA)+U correlated band theory. We show that the around-mean-field LDA+U reproduces the x-ray magnetic circular dichroism (XMCD) experimental data well and does not lead to the formation of a large orbital moment on the Fe atom. Furthermore, exact diagonalization of the multiorbital Anderson impurity model with the full Coulomb interaction matrix and the spin-orbit coupling is performed in order to estimate the spin Hall angle. The obtained value γS≈0.025 suggests that there is no giant extrinsic spin Hall effect due to scattering on iron impurities in gold. © 2011 American Physical Society.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/3ad63a82-85cd-4ee3-b2b6-2d54d8e4200a