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The ground state of Wannier excitons in polar crystals, such as TlCl, TlBr, GaAs, and II‐VI compounds, is investigated. The exciton‐phonon coupling is taken into account by the Fröhlich‐type interaction. Exciton binding energies are evaluated by a combination of a variational method and the second‐order perturbation theory. The theoretical results are compared with those obtained experimentally. A good agreement between theory and experiment is found.
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Kazuo Hattori (1976) studied this question.
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