How Does Spin Hall Effect Couple Charge and Spin Current?

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SUMMARY

The Spin Hall Effect (SHE) is fundamentally driven by the spin-orbit interaction, which couples charge and spin currents through a scattering potential comprising both Coulomb and spin-orbit potentials. This interaction results in a spin-polarized current that exhibits asymmetry relative to the transverse direction of the charge current. The insights provided by Jorge Hirsch's paper clarify the mechanisms behind this coupling, emphasizing the role of scattering in generating spin polarization.

PREREQUISITES
  • Understanding of spin-orbit interaction in condensed matter physics
  • Familiarity with the concepts of charge and spin currents
  • Knowledge of scattering theory in quantum mechanics
  • Basic grasp of Coulomb and spin-orbit potentials
NEXT STEPS
  • Read Jorge Hirsch's paper on the Spin Hall Effect for detailed theoretical insights
  • Explore the implications of spin polarization in materials science
  • Investigate experimental techniques for measuring spin currents
  • Study the applications of the Spin Hall Effect in spintronic devices
USEFUL FOR

Physicists, materials scientists, and engineers interested in spintronics and the fundamental principles of charge and spin current interactions.

semc
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Hi,

I have been trying to understand how the spin hall effect comes about. However, everywhere I look I just find 'the spin-orbit interaction couples the charge and spin current'. I really don't understand how does the current couple through the interaction. Any help would be much appreciated.

Thanks!
 
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I think this paper by Jorge Hirsch will shed some light on your question; https://arxiv.org/pdf/cond-mat/9906160.pdf. The spin-orbit interaction couples to the spin current by a scattering potential which is the sum of a Coulomb potential and a spin-orbit potential. The scattered current becomes spin polarized with asymmetry with respect to the direction transverse to the charge current direction.

Peace,
Fred
 

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