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Interband and Exciton Effects on Faraday Rotation near the Absorption Edge of CuCl

✍ Scribed by S. Suga; T. Koda; T. Mitani

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
394 KB
Volume
55
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The oscillatory behaviour of the Faraday rotation spectra near the absorption edge of CuCl is interpreted in terms of the interband and exciton effects. According to this interpretation, the positive Faraday rotation in low energy regions is predominantly due to the interband effect, while the large negative rotation a t energies just below the exciton absorption band is ascribed to the non‐rigid shift contribution of the exciton effect. Calculation based on this model is in satisfactory agreement with experiment. It is further suggested that the same effect will be also responsible for the similar oscillatory behaviour of the Faraday rotation observed in several semiconductors such as GaSb, GaAs, and CdTe.

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## Abstract Bound exciton states and excitonic resonances have been computed at the valence absorption edge of the solid rare gases Xe, Kr, and Ar. A two‐band model was used to calculate the Green's function of the uncoupled electron–hole pairs and the Coulomb interaction was treated in the resolve