Optical properties of rhenium diselenide single crystals doped with transition metals
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....
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2009
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/5335abe8a65e4d248797ccb75ae87c98 |
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| Sumario: | 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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