Free excitons and optical spectra of sem
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D. Auvergne; J. Camassel
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Article
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1971
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John Wiley and Sons
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English
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## Abstract It is shown, that the excitonic wave functions exhibit a discontinuity at the transition between free and bound states. In the real case where carriers spend a finite time on excited levels, it is possible to neglect the Coulomb interaction when the two particles have a kinetic energy g