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Spin-dependent electron-radiation interaction.

Koshi Okamura1

  • 1Ronin Institute, Montclair, NJ 07043, United States of America.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|June 9, 2021
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Summary

This study derives spin-dependent electron-radiation interactions from the Dirac equation. It identifies spin magnetic moments in atomic and condensed matter systems, with implications for spin relaxation and photoemission.

Keywords:
electro-optical spectraphotoemissionspin polarizationspin relaxation

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Area of Science:

  • Quantum Mechanics
  • Condensed Matter Physics
  • Atomic Physics

Background:

  • Understanding electron-radiation interaction is crucial in quantum mechanics.
  • Spin-dependent phenomena are key in modern electronics and materials science.

Purpose of the Study:

  • To derive and analyze spin-dependent electron-radiation interactions.
  • To investigate the spin magnetic moment term in various systems.
  • To explore connections with spin relaxation and photoemission.

Main Methods:

  • Utilized Foldy-Wouthuysen transformations of the Dirac equation.
  • Performed first-principles calculations for atomic and condensed matter (GaAs).
  • Analyzed spin-preserving and spin-flipping transitions.

Main Results:

  • Successfully derived spin-dependent electron-radiation interaction.
  • Identified a spin magnetic moment term.
  • Calculated this term for GaAs, showing its relevance.

Conclusions:

  • The derived interaction provides a framework for spin-dependent phenomena.
  • The spin magnetic moment term is significant for understanding electron behavior in materials.
  • This work connects fundamental theory to experimental observations like spin relaxation and photoemission.