Charged Excitons in the Quantum Hall Regime: Optical Probe of Fractionally Charged Quasiholes

Schüller, Christian ; Broocks, Kay-Birger ; Schröter, Patrick ; Heyn, Christian ; Heitmann, Detlef ; Bichler, Max ; Wegscheider, Werner ; Apalkov, Vladimir M. ; Chakraborty, Tapash

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We review recent optical experiments on dilute two-dimensional electron systems (2DES) at very low temperatures ( $$T<0.1$$ K) and high magnetic fields. In photoluminescence experiments on a 2DES subjected to a quantizing magnetic field around $$\nu=1/3$$ , we have observed an anomalous dispersion of the charged excitons. We have found that the anomaly exists only at a very low temperature ...