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Exciton Absorption Spectrum in a ZnSiP 2 Crystal
Author(s) -
Madelon R.,
Hurel J.,
Paumier E.
Publication year - 1986
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221360235
Subject(s) - exciton , crystal (programming language) , absorption (acoustics) , reduced mass , absorption edge , absorption spectroscopy , atomic physics , effective mass (spring–mass system) , binding energy , molecular physics , materials science , chemistry , band gap , condensed matter physics , physics , optics , quantum mechanics , computer science , programming language
Abstract Measurements of absorption coefficients near the pseudodirect band edge in ZnSiP 2 are performed using polarized light from 4.2 K to room temperature. By fitting a theoretical curve with the measurements at several temperatures values of the band gaps As′, B′, and C′, as well as the binding energies of the first exciton level are obtained for the three transitions A′, B′, and C′. The last values are temperature independent. Other results are the broadening parameters of the three excitons. Also obtained are the spin‐orbit splitting, the crystal field splitting, and the exciton reduced mass.