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- W2922470232 abstract "Abstract Here we introduce a way to understand the phenomena of localization/delocalization of excitons experimentally as well as by first-principle study. Using in-situ temperature-dependent optical absorption spectroscopy (TD OAS), variation of delocalization parameter (ξ) and electronic disorder in terms of Urbach energy as a function of temperature was estimated. For this purpose, polycrystalline samples of PrFe1−xCrxO3 (x = 0 to 0.25) were synthesized via wet chemical method. The ξ increased with inclusion of Cr doping, which could be understood in terms of an increase in delocalized nature of excitons. Further, the theoretically simulated optical absorption spectrum for undoped and Cr-doped PrFeO3 clearly indicated the change in excitonic peak from almost Gaussian to Lorentzian nature and was explained in terms of an increase in delocalized nature of excitons with inclusion of Cr doping. Thus, using the combination of TD OAS and first-principle calculations, we demonstrated a way to acquire precise information about exciton dynamics, which could be very helpful in understanding many interesting phenomena such as electron–phonon coupling, electronic disorder near band edge and transport properties." @default.
- W2922470232 created "2019-03-22" @default.
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- W2922470232 date "2019-07-01" @default.
- W2922470232 modified "2023-09-24" @default.
- W2922470232 title "Possible evidence of delocalized excitons in Cr-doped PrFeO3: An experimental and theoretical realization" @default.
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- W2922470232 doi "https://doi.org/10.1016/j.jpcs.2019.03.012" @default.
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