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Orbital Inverse Faraday and Cotton-Mouton Effects in Hall Fluids.

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Light induces orbital magnetization in quantum Hall (QH) fluids via two effects: inverse Faraday effect (IFE) and orbital inverse Cotton-Mouton effect (ICME). These phenomena allow for optical control and printing of density profiles in QH systems.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Optics
  • Materials Science

Background:

  • Quantum Hall (QH) fluids exhibit unique electronic properties.
  • Light-matter interactions are crucial for understanding quantum phenomena.
  • Orbital magnetization plays a key role in magnetic responses of materials.

Purpose of the Study:

  • To investigate light-induced orbital magnetization effects in QH fluids.
  • To explore the transverse response of QH fluids to polarized light.
  • To demonstrate optical control and manipulation of QH fluid properties.

Main Methods:

  • Theoretical analysis of light-induced transverse responses in QH fluids.
  • Investigation of inverse Faraday effect (IFE) and orbital inverse Cotton-Mouton effect (ICME).
  • Estimation of induced magnetization in materials like graphene and TMDs.

Main Results:

  • Identified two dominant light-induced orbital magnetization effects in QH fluids: IFE and ICME.
  • Circularly polarized light induces dc magnetization via transverse IFE, dominating in the QH regime.
  • Linearly polarized light induces dc magnetization via ICME, probing chiral orbital response without breaking time-reversal symmetry.
  • Estimated magnetization in the range of 0.5-10 Bohr magnetons per charge carrier.
  • Demonstrated optical quantum printing of density profiles into QH fluids.

Conclusions:

  • Light-induced orbital magnetization effects offer new avenues for controlling quantum Hall fluids.
  • The observed effects provide insights into the chiral orbital response of QH systems.
  • Optical quantum printing enables precise manipulation of electron density in QH fluids.