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Optical detection of quantum Hall effect of composite fermions and evidence of theν=3/8state

Authors :
Giorgio Biasiol
Mario Amado
Vittorio Bellani
Fabio Dionigi
Francesco Rossella
Enrique Diez
Lucia Sorba
V., Bellani
F., Dionigi
Rossella, Francesco
M., Amado
E., Diez
G., Biasiol
L., Sorba
Source :
Physical Review B. 81
Publication Year :
2010
Publisher :
American Physical Society (APS), 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 $\ensuremath{\nu}=4/5$, 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 $\ensuremath{\nu}=3/8$, 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.

Details

ISSN :
1550235X and 10980121
Volume :
81
Database :
OpenAIRE
Journal :
Physical Review B
Accession number :
edsair.doi.dedup.....3fa3325be056705e86883e3226ebdb26