Abstract
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 language | English |
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Article number | 17LT02 |
Number of pages | 4 |
Journal | Journal of Physics D: Applied Physics |
Volume | 53 |
Issue number | 17 |
DOIs | |
Publication status | Published - 19 Feb 2020 |
Keywords
- CuGaSe2
- photoluminescence
- PL
- optical reflectivity
- semiconductors
- optical spectroscopy
- magnetic fields