The g-factor of CuGaSe2 studied by circularly polarised magneto-reflectance(Article)(Open Access)
- aDepartment of Physics, SUPA, Strathclyde University, Glasgow, G4 0NG, United Kingdom
- bM.N. Miheev Institute of Metal Physics of UB RAS, Ekaterinburg, 620108, Russian Federation
- cUral Federal University, Ekaterinburg, 620002, Russian Federation
- dInstitute of Solid State Chemistry of the UB RAS, Ekaterinburg, 620990, Russian Federation
- eUniv. Grenoble Alpes, INSA Toulouse, Univ. Toulouse Paul Sabatier, EMFL, CNRS, LNCMI, Grenoble, 38000, France
- fScientific-Practical Material Research Centre, National Academy of Sciences of Belarus, Minsk, 220072, Belarus
Abstract
High structural quality single crystals of CuGaSe2 were studied using photoluminescence (PL), optical reflectivity (OR) and circularly polarised magneto-reflectance (MR) at 4.2 K 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. © 2020 IOP Publishing Ltd.
Indexed keywords
| Engineering controlled terms: | Blue shiftCopper compoundsExcitonsMagnetic fieldsOptical latticesReflectionSelenium compounds |
|---|---|
| Engineering uncontrolled terms | CuGaSe2Effective g-factorFree excitonsG factorsOptical reflectivitySpectral positionStructural qualitiesTetragonal distortion |
| Engineering main heading: | Gallium compounds |
- ISSN: 00223727
- CODEN: JPAPB
- Source Type: Journal
- Original language: English
- DOI: 10.1088/1361-6463/ab6f1a
- Document Type: Article
- Publisher: Institute of Physics Publishing
© Copyright 2020 Elsevier B.V., All rights reserved.