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Your search keyword '"Mammadov, A.I."' showing total 9 results
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9 results on '"Mammadov, A.I."'

7. High Pressure Raman Study of Layered Semiconductor Tlgase2.

Author

Aliyeva, V.B., Mammadov, T.G., Mammadov, A.I., Babayev, S.S., Pashayeva, E.G., Jabarov, S.H., Kichanov, S.E., Dubrovinsky, L.S., and Dang, N.T.

Subjects
RAMAN spectroscopy, PHASE transitions, GRUNEISEN constant, MOLECULAR crystals, CHALCOGENIDES
Abstract

Raman spectroscopy measurements of a monoclinic layered semiconductor TlGaSe2were performed in a pressure range up to 10.24 GPa. The pressure-induced first-order phase transition accompanied by reconstruction of the layer structure was observed at the pressure P ~ 0.9 GPa. The mode-Grüneisen parameters of intralayer bonds were calculated for TlGaSe2. The contribution of thermal expansion to temperature changes of phonon frequencies was defined. The type of intralayer bonds and their pressure transformation were analyzed in layered TlGaSe2. It was shown that the nature of intramolecular forces in molecular crystals and intralayer forces in layered GaS, GaSe and TlGaSe2is similar [ABSTRACT FROM AUTHOR]

Published
2018
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8. High Pressure Raman Study of Layered Semiconductor Tlgase2.

Author

Aliyeva, V.B., Mammadov, T.G., Mammadov, A.I., Babayev, S.S., Pashayeva, E.G., Jabarov, S.H., Kichanov, S.E., Dubrovinsky, L.S., and Dang, N.T.

Subjects
*RAMAN spectroscopy, *PHASE transitions, *GRUNEISEN constant, *MOLECULAR crystals, *CHALCOGENIDES
Abstract

Raman spectroscopy measurements of a monoclinic layered semiconductor TlGaSe2were performed in a pressure range up to 10.24 GPa. The pressure-induced first-order phase transition accompanied by reconstruction of the layer structure was observed at the pressure P ~ 0.9 GPa. The mode-Grüneisen parameters of intralayer bonds were calculated for TlGaSe2. The contribution of thermal expansion to temperature changes of phonon frequencies was defined. The type of intralayer bonds and their pressure transformation were analyzed in layered TlGaSe2. It was shown that the nature of intramolecular forces in molecular crystals and intralayer forces in layered GaS, GaSe and TlGaSe2is similar [ABSTRACT FROM AUTHOR]

Published
2018
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9. Structural polymorphism in multiferroic BiMnO3 at high pressures and temperatures.

Author

Kozlenko, D.P., Dang, N.T., Jabarov, S.H., Belik, A.A., Kichanov, S.E., Lukin, E.V., Lathe, C., Dubrovinsky, L.S., Kazimirov, V.Yu., Smirnov, M.B., Savenko, B.N., Mammadov, A.I., Takayama-Muromachi, E., and Khiem, L.H.

Subjects
*BISMUTH compounds, *MULTIFERROIC materials, *HIGH pressure (Technology), *TEMPERATURE effect, *POLYMORPHISM (Crystallography), *CRYSTAL structure
Abstract

Highlights: [•] The detailed P–T phase diagram of BiMnO3 was established. [•] We found three monoclinic modifications of BiMnO3 at pressure and temperature. [•] A suppression of monoclinic C2/c phase have been observed under pressure. [•] We found a new orthorhombic Imma phase of BiMnO3 at P >20GPa. [Copyright &y& Elsevier]

Published
2014
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