In the photoluminescence spectra of a two-dimensional electron gas in the fractional quantum Hall regime we observe for the first time the states at filling factor ν=4/5, 5/7, 4/11, and 3/8 as clear minima in the emission peak intensity or area. The first three states are described as interacting composite fermions in fractional quantum Hall regime. The minimum in the intensity at ν=3/8, which is not explained within this picture, can be an evidence of a suppression of the screening of the coulomb interaction among the effective quasiparticles involved in this intriguing state.
Optical detection of quantum Hall effect of composite fermions and evidence of the ν=3/8 state / Bellani, V.; Dionigi, F.; Rossella, F.; Amado, M.; Diez, E.; Biasiol, G.; Sorba, L.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 81:15(2010), pp. 155316-155320. [10.1103/PhysRevB.81.155316]
Optical detection of quantum Hall effect of composite fermions and evidence of the ν=3/8 state
F. Rossella;
2010
Abstract
In the photoluminescence spectra of a two-dimensional electron gas in the fractional quantum Hall regime we observe for the first time the states at filling factor ν=4/5, 5/7, 4/11, and 3/8 as clear minima in the emission peak intensity or area. The first three states are described as interacting composite fermions in fractional quantum Hall regime. The minimum in the intensity at ν=3/8, which is not explained within this picture, can be an evidence of a suppression of the screening of the coulomb interaction among the effective quasiparticles involved in this intriguing state.
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