The g-factor of CuGaSe2 studied by circularly polarised magneto-reflectance

M V Yakushev, M A Sulimov, C Faugeras, A V Mudryi, R W Martin

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High structural quality single crystals of CuGaSe2 were studied using photoluminescence (PL), optical reflectivity (OR) and circularly polarised magneto-reflectance (MR) at 4.2K in magnetic fields B up to 14 T. At B = 0 T both the PL and OR spectra exhibited the A free exciton, associated with the uppermost sub-band of the valence band of CuGaSe2 split by the tetragonal distortion in the lattice. The magnetic field induced a blue shift of the exciton in the MR spectra. Analysis of the dependence of the spectral position of the A exciton on B in the MR spectra, measured for both right and left circular polarisations of light, enabled the magnitude of its effective g-factor to be determined |g| = 0.46.
Original languageEnglish
Article number17LT02
Number of pages4
JournalJournal of Physics D: Applied Physics
Issue number17
Publication statusPublished - 19 Feb 2020


  • CuGaSe2
  • photoluminescence
  • PL
  • optical reflectivity
  • semiconductors
  • optical spectroscopy
  • magnetic fields


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