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.
- optical reflectivity
- optical spectroscopy
- magnetic fields
Yakushev, M. V., Sulimov, M. A., Faugeras, C., Mudryi, A. V., & Martin, R. W. (2020). The g-factor of CuGaSe2 studied by circularly polarised magneto-reflectance. Journal of Physics D: Applied Physics, 53(17), [17LT02]. https://doi.org/10.1088/1361-6463/ab6f1a