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29 March 2024
 
  » arxiv » cond-mat/0103561

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Charged exctions in the fractional quantum Hall regime
G. Yusa ; H. Shtrikman ; I. Bar-Joseph ;
Date 27 Mar 2001
Subject Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall
AbstractWe study the photoluminescence spectrum of a low density ($ u <1$) two-dimensional electron gas at high magnetic fields and low temperatures. We find that the spectrum in the fractional quantum Hall regime can be understood in terms of singlet and triplet charged-excitons. We show that these spectral lines are sensitive probes for the electrons compressibility. We identify the dark triplet charged-exciton and show that it is visible at the spectrum at $T<2$ K. We find that its binding energy scales like $e^{2}/l $, where $l$ is the magnetic length, and it crosses the singlet slightly above 15 T.
Source arXiv, cond-mat/0103561
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