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Luminescence Measurements of Two‐Dimensional Electrons in the Regime of the Integer and Fractional Quantum Hall Effects
Author(s) -
Pulsford N. J.,
Kukushkin I. V.,
Hawrylak P.,
Ploog K.,
Haug R. J.,
von Klitzing K.,
Timofeev V. B.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221730127
Subject(s) - quasiparticle , quantum hall effect , electron , condensed matter physics , heterojunction , fractional quantum hall effect , physics , luminescence , radiative transfer , population , magnetic field , landau quantization , quantum well , fermi gas , atomic physics , quantum mechanics , quantum spin hall effect , optics , laser , superconductivity , demography , sociology
The radiative recombination of two‐dimensional electrons is studied in GaAs–GaAlAs heterojunctions with holes localised on acceptors in strong magnetic fields. The optical measurements are emphasized as a probe of the properties of the two‐dimensional electron layer. In the case of two subbands occupied, spatial changes in the self‐consistent potential due to a population in the second subband are demonstrated. In the regime of the fractional quantum Hall effect, downward cusps occur in the mean energy of the luminescence at fractional filling factors and values for the quasiparticle energy gaps are derived.