Khudaiberdiev, D. A., Shuvaev, A., Shchepetilnikov, A. V., Muravev, V. M., Glazov, M. M., Reichl, C., Wegscheider, W., Pimenov, A., & Kukushkin, I. V. (2025). Polarization-resolved electron spin resonance in a two-dimensional electron system. Physical Review B, 112(16), Article L161401. https://doi.org/10.1103/4lyv-jvq5
E138-05 - Forschungsbereich Solid State Spectroscopy E130 - Fakultät für Physik
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Journal:
Physical Review B
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ISSN:
2469-9950
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Date (published):
1-Oct-2025
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Number of Pages:
6
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Publisher:
AMER PHYSICAL SOC
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Peer reviewed:
Yes
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Keywords:
Electron Spin Resonance (ESR); Terahertz; Quantum wells
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Abstract:
We report on polarization-resolved electron spin resonance (ESR) in a two-dimensional electron system in AlAs quantum wells. The transmission spectra in the subterahertz frequency range reveals unusual behavior as a function of the light polarization and of experimental geometry. In the Faraday geometry, the excitation conditions for spin resonance are reversed compared with the cyclotron resonance, while in the Voigt geometry the absorption exhibits a twofold dependence on the azimuthal angle of an in-plane static magnetic field. These results contradict a pure magnetic nature of ESR in AlAs quantum wells, revealing a dominating Dresselhaus spin-orbit coupling as a microscopic mechanism of the electric-dipole absorption. A theoretical model that includes an inversion asymmetry and the spin-orbit coupling successfully explains the experimental observations.
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Project (external):
Russian Science Foundation
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Project ID:
20-72-10097-extension
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Research Areas:
Special and Engineering Materials: 40% Surfaces and Interfaces: 30% Nanoelectronics: 30%
CC BY 4.0
