Work

Spin polarization of quantum Hall states for filling factors 1 ⩽ ν ⩽ 2 measured with microcavity polaritons

Year: 2025

Type: article

Abstract: Spin polarization measurements were performed in three 2D electron gases in GaAs with densities n e = 9.1 , 7.2 and 6.5 × 10 10 cm−2, in the quantum Hall regime. Full spin polarization at ν = 1 surrounded by rapid depolarization due to Skyrmion formation was observed in all devices, consistent with past measurements. Depolarization of the ν = 4 / 3 , 8/5 states and repolarization of the ν = 5 / 3 state was also measured, in remarkable agreement with a non-interacting, disorder-free Composite Fermion model. Optical power and temperature dependent measurements of the ν = 1 state suggest a regime of non-linear optics.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/adccf0

Authors: Odysseas Williams, Stefan Faelt, Filip Krizek, Werner Wegscheider

Institutions: ETH Zurich, Laboratory for Solid State Physics, Institute for Quantum Electronics, IBM Research - Zurich

Language: Latvian

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funders: National Science Foundation, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Center of Competence in Research Quantum Science and Technology