The excitonic absorption of CdS under pressure |
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| Authors: | M Lindner S H L Zott G F Schötz W Gebliardt P Perlin P Wihiewski |
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| Institution: | 1. Institut für Festk?rperphysik, Universit?t Regensburg , Universit?tsstrasse 31, W-8400 R, Regensburg, FRG;2. Unipress, Polish Academy of Sciences , Sokolowska 29/37, 1-142, Warzaw, Poland |
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| Abstract: | Abstract We have investigated the pressure dependence of the absorption edge of tlie EA-EB- and the EC-excitons of 1pi thick CtlS(hex) crystal slabs. We obtaiurd dEΘ/dP =dEc/dP = 47±3 meV/GPa for T=300K and dEA/dP= dEB/dP = 43±3 meV/GPa for T=78K. With tliese values we were able to determine the crystal-field splitting (68f4 nieV) aid the spin-orbit splitting (26±2 meV). The resulting pressure shifts of tlie rxcitonic energies were in agreement witli a κ · p-calculation of tlie transition energies using tlie perturbation niatrix of G.E. Pikus for Δso ? Δc. The refractive Index n‖c was iiieasured for T=300K up to 2.2 GPa and described by Marples Model. |
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