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This article is cited in 1 scientific paper (total in 1 paper)
Semiconductors
Effect of the chemical composition of TlIn$_{1-x}$Er$_{x}$S$_{2}$ (0 $\le x\le$ 0.01) crystals on their dielectric characteristics and the parameters of localized states
S. N. Mustafaevaa, M. M. Asadovb a Institute of Physics Azerbaijan Academy of Sciences, Baku, Azerbaijan
b Institute of Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Sciences, Baku
Abstract:
The frequency dependences of the real $(\varepsilon)$' and imaginary $(\varepsilon)$" components of the complex dielectric constant, tangent of dielectric loss (tan$\delta$) and ac conductivity $(\sigma_{\operatorname{ac}})$ of the obtained TlIn$_{1-x}$Er$_{x}$S$_{2}$ (0 $\le x\le$ 0.01) crystals have been studied in the frequency range $f$ = 5 $\times$ 10$^4$ - 3.5 $\times$ 10$^7$ Hz. It is established that in TlIn$_{1-x}$Er$_{x}$S$_{2}$ a relaxation dispersion of $\varepsilon$' and $\varepsilon$" takes place. The effect of erbium concentration (Er) in TlIn$_{1-x}$Er$_{x}$S$_{2}$ crystals on their dielectric coefficients was studied. In the high frequency range, the ac conductivity of TlIn$_{1-x}$Er$_{x}$S$_{2}$ crystals obeyed the $\sigma_{\operatorname{ac}}\sim f^{0.8}$ law, which is characteristic of a hopping charge transfer mechanism at states localized near the Fermi level. The parameters of states localized in the band gap and the influence of the chemical composition of the TlIn$_{1-x}$Er$_{x}$S$_{2}$ crystals on these parameters are estimated.
Keywords:
multinary TlIn$_{1-x}$Er$_{x}$S$_{2}$ crystals, frequency dispersion, dielectric loss, charge transfer, hopping mechanism, parameters of localized states.
Received: 17.06.2019 Revised: 03.07.2019 Accepted: 05.07.2019
Citation:
S. N. Mustafaeva, M. M. Asadov, “Effect of the chemical composition of TlIn$_{1-x}$Er$_{x}$S$_{2}$ (0 $\le x\le$ 0.01) crystals on their dielectric characteristics and the parameters of localized states”, Fizika Tverdogo Tela, 61:11 (2019), 2030–2035; Phys. Solid State, 61:11 (2019), 1999–2004
Linking options:
https://www.mathnet.ru/eng/ftt8611 https://www.mathnet.ru/eng/ftt/v61/i11/p2030
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