This article is cited in 12 papers

Dielectrics

Urbach rule and estimation of the energy gap width in molybdates

F. D. Fedyunin^a, D. A. Spassky<sup>b

a</sup> Lomonosov Moscow State University
^b Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics

Abstract: The temperature dependence of the fundamental absorption edge in molybdates CaMoO$_{4}$, SrMoO$_{4}$, PbMoO$_{4}$, Pb$_{2}$MoO$_{5}$, and MgMoO$_{4}$ has been studied. The dependences are approximated using the Urbach formula. Parameter $E_0$ obtained as a result of the approximation is shown can be used to estimate the energy gap width in the molybdates.

Keywords: Urbach rule, molybdates, excitons, energy gap width.

Received: 06.03.2020
Revised: 06.03.2020
Accepted: 01.04.2020

DOI: 10.21883/FTT.2020.08.49598.052

 English version: Physics of the Solid State, 2020, 62:8, 1325–1332

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