Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
![]() |
![]() ![]() |
![]() GOMIS, Oscar, VILAPLANA, Rosario Isabel, MANJN, F. J., PEREZ-GONZALEZ, Eduardo, LOPEZ-SOLANO, Javier, RODRGUEZ-HERNNDEZ, P., MUOZ, Alfonso G., ERRANDONEA, Daniel J.H., RUIZ-FUERTES, Javier, SEGURA, Alfredo, SANTAMARA-PEREZ, D., TIGINYANU, Ion, URSAKI, Veaceslav. High-pressure optical and vibrational properties of CdGa 2Se 4: Order-disorder processes in adamantine compounds. In: Journal of Applied Physics, 2012, vol. 111, p. 0. ISSN 0021-8979. DOI: https://doi.org/10.1063/1.3675162 |
EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
Journal of Applied Physics | |
Volumul 111 / 2012 / ISSN 0021-8979 /ISSNe 1089-7550 | |
|
|
DOI:https://doi.org/10.1063/1.3675162 | |
Pag. 0-0 | |
Vezi articolul | |
Rezumat | |
High-pressure optical absorption and Raman scattering measurements have been performed in defect chalcopyrite (DC) CdGa 2Se 4 up to 22 GPa during two pressure cycles to investigate the pressure-induced order-disorder phase transitions taking place in this ordered-vacancy compound. Our measurements reveal that on decreasing pressure from 22 GPa, the sample does not revert to the initial phase but likely to a disordered zinc blende (DZ) structure the direct bandgap and Raman-active modes of which have been measured during a second upstroke. Our measurements have been complemented with electronic structure and lattice dynamical ab initio calculations. Lattice dynamical calculations have helped us to discuss and assign the symmetries of the Raman modes of the DC phase. Additionally, our electronic band structure calculations have helped us in discussing the order-disorder effects taking place above 6-8 GPa during the first upstroke. |
|
Cuvinte-cheie Engineering controlled terms Copper compounds, Electronic structure Engineering uncontrolled terms Ab initio calculations, Dynamical calculations, Electronic band structure calculation, Order disorder phase transitions, Order-disorder effects, Pressure cycles, Raman active modes, Raman modes, Raman Scattering measurements, Vibrational properties, Zinc blende Engineering main heading Calculations |
|
|