The Narrow Bands of Exciton Absorption in Polar Solids and Alloys

F. V. Kusmartsev

doi:10.1002/pssb.2221310224

The Narrow Bands of Exciton Absorption in Polar Solids and Alloys

F. V. Kusmartsev

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

An analytical theory of the Urbach‐Martienssen tail for the Wannier‐Mott excitons in polar crystals and alloys is developed on the basis of the expansion of all quantities in the small parameter δ ≪ Ei(μ/M), where M and μ are the translation and the reduced masses of the exciton; E_i is the exciton Rydberg, and δ is the photon deficit. The exciton absorption coefficient and the length of the absorption tail are calculated. The latter characterizes the width of the exciton absorption band. The results obtained are compared with experiments on the exciton absorption in layered polar crystals.

Original language	British English
Pages (from-to)	621-629
Number of pages	9
Journal	Physica Status Solidi (B) Basic Research
Volume	131
Issue number	2
DOIs	https://doi.org/10.1002/pssb.2221310224
State	Published - 1 Oct 1985

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AB - An analytical theory of the Urbach‐Martienssen tail for the Wannier‐Mott excitons in polar crystals and alloys is developed on the basis of the expansion of all quantities in the small parameter δ ≪ Ei(μ/M), where M and μ are the translation and the reduced masses of the exciton; Ei is the exciton Rydberg, and δ is the photon deficit. The exciton absorption coefficient and the length of the absorption tail are calculated. The latter characterizes the width of the exciton absorption band. The results obtained are compared with experiments on the exciton absorption in layered polar crystals.

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The Narrow Bands of Exciton Absorption in Polar Solids and Alloys

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