Light-induced rectified orbital magnetization in electron-hole bilayers
Abstract
Circularly polarized light can rectify orbital motion into a static magnetization through the inverse Faraday effect (IFE), but in electron-hole bilayers the electron and hole contributions cancel exactly when their properties are equivalent. We show that electron-hole bilayers in transition-metal dichalcogenide platforms avoid this cancellation through effective-mass asymmetry alone, and that the surviving orbital IFE is sensitive to interlayer coupling. In the weak-coupling regime, a two-component Drude description yields an induced magnetization of order one Bohr magneton per carrier for representative terahertz driving. In the strong-coupling regime, where the carriers bind into interlayer excitons, we treat the relative motion using a hydrogenic model with a Rytova-Keldysh interaction and obtain a reduced but finite response. We give closed-form expressions that allow estimates across a broad parameter range and identify where the response is largest.
Related
- Quantum Geometric Origin of Nonlinear Current Induced Orbital Magnetization
- Resonant Induced Orbital Electron Capture: Novel method for low-energy ν̅e detection
- Orbital Magnetization within Self-Consistent Hartree-Fock via an Envelope Theorem
- Efficient field-free magnetization switching through orbital-current-enhanced magnon torque.
- Bilinear magnon--exciton coupling in biased ferromagnetic electron--hole bilayers
BibTeX
@misc{syljuasen2026lightinduced,
title = {{Light-induced rectified orbital magnetization in electron-hole bilayers}},
author = {Erlend Syljuåsen and Gabriel Cardoso and Esra Ilke Albar and Patrick J. Wong and Angel Rubio and Alexander V. Balatsky},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.29089},
eprint = {2609.29089},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.29089},
}
RIS
TY - UNPB
TI - Light-induced rectified orbital magnetization in electron-hole bilayers
AU - Erlend Syljuåsen
AU - Gabriel Cardoso
AU - Esra Ilke Albar
AU - Patrick J. Wong
AU - Angel Rubio
AU - Alexander V. Balatsky
PY - 2026
DA - 2026/09/24
PB - arXiv
DO - 10.48550/arxiv.2609.29089
UR - https://arxiv.org/abs/2609.29089
AB - Circularly polarized light can rectify orbital motion into a static magnetization through the inverse Faraday effect (IFE), but in electron-hole bilayers the electron and hole contributions cancel exactly when their properties are equivalent. We show that electron-hole bilayers in transition-metal dichalcogenide platforms avoid this cancellation through effective-mass asymmetry alone, and that the surviving orbital IFE is sensitive to interlayer coupling. In the weak-coupling regime, a two-component Drude description yields an induced magnetization of order one Bohr magneton per carrier for representative terahertz driving. In the strong-coupling regime, where the carriers bind into interlayer excitons, we treat the relative motion using a hydrogenic model with a Rytova-Keldysh interaction and obtain a reduced but finite response. We give closed-form expressions that allow estimates across a broad parameter range and identify where the response is largest.
ER -