The known experimental absorption spectra were used to calculate the dielectric spectra of GeTe, SnTe, and PbTe crystals in the region of electron transitions from the core d-bands of cations. Their characteristic features and general regularities are revealed. Using the combined Argand diagram method, the dielectric spectra of each crystal were decomposed into six elementary oscillators and their main parameters were determined. The nature of formation of these oscillators is proposed on the basis of the theory of interband and exciton transitions.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 44–49, September, 2020.
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Perevoshchikov, D.A., Sobolev, V.V., Kalugin, A.I. et al. Dielectric Spectra and d-bands Structure of Germanium, Tin, and Lead Tellurides. Russ Phys J 63, 1497–1503 (2021). https://doi.org/10.1007/s11182-021-02197-6
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DOI: https://doi.org/10.1007/s11182-021-02197-6