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Gentle Floquet control of orbital Hall effect and orbital inverse Faraday effect

  • Pei-Han Lin
  • Roderich Moessner
  • Egor I. Kiselev
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Abstract

Floquet engineering controls material responses via a time-periodic electromagnetic drive. An important task in practice is to reduce the driving strengths required to implement Floquet protocols. We show that in systems with strong phase-space constraints, where the response is dominated by a small region of momentum space, the relative impact of a resonant Floquet drive is enhanced. We demonstrate this idea on the example of the orbital Hall effect, where equilibrium occupations restrict the interband coherence to a narrow momentum interval ℏΔk. The ratio eE0/(Ω0ℏΔk), where Ω0 is the frequency of the drive, is considerable even at modest field amplitudes E0, leading to a large relative change in the orbital Hall conductivity. Due to the non-trivial orbital texture, the circularly polarized drive induces an inverse orbital Faraday effect by magnetizing the electrons. We show that the corresponding susceptibility is controlled by the interband quantum metric that determines the resonant Floquet hybridization.

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Cite

BibTeXRIS
BibTeX
@misc{lin2026gentle,
  title = {{Gentle Floquet control of orbital Hall effect and orbital inverse Faraday effect}},
  author = {Pei-Han Lin and Roderich Moessner and Egor I. Kiselev},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.10109},
  eprint = {2610.10109},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.10109},
}
RIS
TY  - UNPB
TI  - Gentle Floquet control of orbital Hall effect and orbital inverse Faraday effect
AU  - Pei-Han Lin
AU  - Roderich Moessner
AU  - Egor I. Kiselev
PY  - 2026
DA  - 2026/10/08
PB  - arXiv
DO  - 10.48550/arxiv.2610.10109
UR  - https://arxiv.org/abs/2610.10109
AB  - Floquet engineering controls material responses via a time-periodic electromagnetic drive. An important task in practice is to reduce the driving strengths required to implement Floquet protocols. We show that in systems with strong phase-space constraints, where the response is dominated by a small region of momentum space, the relative impact of a resonant Floquet drive is enhanced. We demonstrate this idea on the example of the orbital Hall effect, where equilibrium occupations restrict the interband coherence to a narrow momentum interval ℏΔk. The ratio eE_0/(Ω_0ℏΔk), where Ω_0 is the frequency of the drive, is considerable even at modest field amplitudes E_0, leading to a large relative change in the orbital Hall conductivity. Due to the non-trivial orbital texture, the circularly polarized drive induces an inverse orbital Faraday effect by magnetizing the electrons. We show that the corresponding susceptibility is controlled by the interband quantum metric that determines the resonant Floquet hybridization.
ER  -