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Updated: Jul 1, 2025

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Orbital Rashba Effect as a Platform for Robust Orbital Photocurrents.

T Adamantopoulos1,2, M Merte1,2,3, D Go1,3

  • 1Peter Grünberg Institut, Forschungszentrum Jülich and JARA, 52425 Jülich, Germany.

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|March 1, 2024
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Summary
This summary is machine-generated.

Laser pulses generate robust orbital currents in materials lacking inversion symmetry via the orbital Rashba effect. This research advances optical generation of angular momentum currents for potential applications.

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Area of Science:

  • Condensed Matter Physics
  • Magnetotransport Phenomena
  • Optoelectronics

Background:

  • Orbital current is a significant concept in magnetotransport.
  • Broken inversion symmetry is crucial for observing novel electronic phenomena.

Purpose of the Study:

  • To demonstrate laser-induced generation of orbital currents.
  • To explore the role of the orbital Rashba effect in photocurrent generation.
  • To investigate the link between orbital and spin currents.

Main Methods:

  • Utilized laser pulses for current generation.
  • Employed model and first-principles calculations.
  • Investigated systems with broken inversion symmetry due to the orbital Rashba effect.

Main Results:

  • Generated large and robust nonrelativistic orbital currents using laser pulses.
  • Orbital Rashba effect and crystal field splitting mediate photocurrents without spin-orbit interaction.
  • Nonrelativistic orbital photocurrents translate to spin photocurrents under relativistic effects.

Conclusions:

  • Orbital photocurrents offer a promising route for optical angular momentum current generation.
  • The findings pave the way for new applications in spintronics and optoelectronics.