Self-trapped exciton in caesium iodide. I. Theory
- 29 February 1980
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 13 (6) , 983-992
- https://doi.org/10.1088/0022-3719/13/6/009
Abstract
The electronic structure of the self-trapped exciton (STE) in caesium iodide is investigated by a semi-empirical molecular-orbital method. The STE states are constructed by considering the relaxed electronic states of a cluster composed of an anionic diatomic I2- molecule surrounded by its nearest-neighbour Cs+ ions. For the electronic states, the 6s and 5d orbitals of the Cs+ ions are taken into account. Two types of STE states are obtained; the lower level manifold of each one is composed of a split triplet state and a singlet state. Both give rise to pi -emissions with a rather long radiative lifetime. The general expressions for the magnetic circular polarisation, the magnetic linear polarisation and the lifetime of the emissions are derived and discussed.Keywords
This publication has 10 references indexed in Scilit:
- Self-trapped excitons in caesium iodide. II. Magneto-optical propertiesJournal of Physics C: Solid State Physics, 1980
- Self-trapped exciton in caesium iodide. III. Polarisation of the emissionsJournal of Physics C: Solid State Physics, 1980
- ESR of Vk centers in CsISolid State Communications, 1975
- Electronic structure of the self-trapped exciton in alkali fluorides and chloridesJournal of Physics C: Solid State Physics, 1975
- Electronic structure of the self-trapped exciton in sodium chlorideJournal of Physics C: Solid State Physics, 1974
- Theory of Self-Trapped Exciton Luminescence in Halide CrystalsPhysical Review B, 1973
- Study of Vκ centers in CsI crystalSolid State Communications, 1973
- Kinetics of self‐trapped exciton recombination in CsIPhysica Status Solidi (b), 1971
- Energy Bands in CsIJournal of the Physics Society Japan, 1968
- Optical Absorption Spectra of the Alkali Halides at 10°KPhysical Review B, 1967