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SM ISO690:2012 DUMCHENKO, Dumitru, HUANG, Ying-Sheng, HO, Ching-Hwa. Optical properties of rhenium diselenide single crystals doped with transition metals. In: Moldavian Journal of the Physical Sciences, 2009, nr. 3-4(8), pp. 271-276. ISSN 1810-648X. |
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Moldavian Journal of the Physical Sciences | ||||||
Numărul 3-4(8) / 2009 / ISSN 1810-648X /ISSNe 2537-6365 | ||||||
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Pag. 271-276 | ||||||
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Rezumat | ||||||
In this paper, we focus on optical properties of rhenium diselenide (ReSe2) single crys-
tals doped with Au, W, and Nb. The doping effect of the material was characterized by polarization-dependent piezoreflectance (PzR) and photoreflectance (PR) measurements in the
temperature range of 15–300 K. The low temperature PzR and PR spectra reveal the observation of
ex
E1 feature at E||b polarization as well as two features
ex
E2 and exE3 at E⊥b polarization. In comparison with the undoped ReSe2, the excitonic transition energies remain
practically unchanged, while the broadening parameter of the excitonic transition features
slightly increases due to impurity scattering. The angular dependence of the excitonic features
amplitudes agree well with the Malus law.
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