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Listar por palabra clave "Raman scattering"

Mostrando ítems 1-17 de 17

Combined Experimental and Theoretical Studies: Lattice-Dynamical Studies at High Pressures with the Help of Ab Initio Calculations

Manjón, Francisco-Javier; Sans-Tresserras, Juan Ángel; Rodríguez-Hernández, Placida; Muñoz, Alfonso (MDPI AG, 2021-11)

[EN] Lattice dynamics studies are important for the proper characterization of materials, since these studies provide information on the structure and chemistry of materials via their vibrational properties. These studies ...
High pressure phase transitions in NdVO4

Panchal, V.; Errandonea, Daniel; Manjón Herrera, Francisco Javier; Muñoz, Alfonso; Rodríguez Hernández, Plácida; Bettinelli, Marco; Achary, S.N.; Tyagi, A.K. (AIP Publishing, 2015)

Raman-scattering measurements on NdVO4 suggest a pressure-induced zircon to monazite phase transition beyond 5.9 GPa. The monazite phase undergoes a second phase transition to a yet unknown phase at 18.1 GPa. Lattice-dynamics ...
High-pressure lattice dynamical study of bulk and nanocrystalline In2O3

Garcia Domene, Braulio; Ortiz, H. M.; Gomis Hilario, Oscar; Sans, J. A.; Manjón Herrera, Francisco Javier; Muñoz, A.; Rodríguez-Hernández, P.; Achary, S. N.; Errandonea, D.; Martínez-García, D.; Romero, A. H.; Singhal, A.; Tyagi, A. K. (American Institute of Physics (AIP), 2012-12-19)

The effect of pressure on the vibrational properties of bulk and nanocrystallinepowders of cubic bixbyite-type In2O3 has been investigated at room temperature by means of Raman spectroscopy up to 31.6 and 30¿GPa, respectively. ...
High-pressure optical and vibrational properties of CdGa2Se4: Order-disorder processes in adamantine compounds

Gomis Hilario, Oscar; Vilaplana Cerda, Rosario Isabel; Manjón Herrera, Francisco Javier; Pérez-González, E.; López-Solano, Javier; Rodríguez-Hernández, P.; Muñoz, Alfonso; Errandonea, Daniel; Ruiz Fuertes, Javier; Segura Garcia del Rio, Alfredo; Santamaría Pérez, David; Tiginyanu, Ivan; Ursaki, Veacheslav (American Institute of Physics (AIP), 2012-01-10)

High-pressure optical absorption and Raman scattering measurements have been performed in defect chalcopyrite (DC) CdGa2Se4 up to 22 GPa during two pressure cycles to investigate the pressure-induced order-disorder phase ...
High-pressure Raman scattering study of defect chalcopyrite and defect stannite ZnGa2Se4

Vilaplana Cerda, Rosario Isabel; Gomis Hilario, Oscar; Pérez-González, E.; Ortiz, H. M.; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, P.; Muñoz, Alfonso; Alonso Gutiérrez, P.; Sanjuán, M.L.; Ursaki, Veacheslav; Tiginyanu, Ivan (American Institute of Physics (AIP), 2013-06-17)

High-pressure Raman scattering measurements have been carried out in ZnGa2Se4 for both tetragonal defect chalcopyrite and defect stannite structures. Experimental results have been compared with theoretical lattice dynamics ...
High-pressure theoretical and experimental study of HgWO4

Lopez-Solano, J.; Rodriguez-Hernandez, Plácida; Muñoz, A.; Santamaria-Perez, David; Manjón Herrera, Francisco Javier; Ray, S.; Gomis Hilario, Oscar; Mollar García, Miguel Alfonso; Panchal, V.; Errandonea, Daniel (Taylor & Francis, 2011-03)

HgWO 4 at ambient pressure is characterized using a combination of ab initio calculations, X-ray diffraction and Raman scattering measurements. The effect of low pressure and temperature on the structural stability is ...
Joint experimental and theoretical study of bulk Y2O3 at high pressure

Pereira, A.L.J.; Sans-Tresserras, Juan Ángel; Gomis, O.; Santamaría-Pérez, D.; Ray, S.; Rodríguez-Hernández, P.; Godoy-Jr., A.; da Silva-Sobrinho, A.S.; Muñoz, A.; Popescu, C.; Manjón, Francisco-Javier (Elsevier, 2023-06)

[EN] We report a joint experimental and theoretical study of the structural and vibrational properties of C-type bulk Y2O3 under hydrostatic compression. The combination of high-pressure X-ray diffraction and Raman scattering ...
Lattice dynamics study of cubic Tb2O3

Ibanez, Jordi; Blazquez, Oriol; Hernandez, Sergi; Garrido, Blas; Rodríguez-Hernández, Plácida; Munoz, Alfonso; Velazquez, Matias; Veber, Philippe; Manjón, Francisco-Javier (John Wiley & Sons, 2018-12-16)

[EN] We report a joint experimental and theoretical study of the lattice dynamics of cubic Tb2O3. Up to 16 optical Raman-active modes have been observed with polarized and unpolarized Raman scattering measurements on a ...
Lattice dynamics study of HgGa2Se4 at high pressures

Vilaplana Cerda, Rosario Isabel; Gomis Hilario, Oscar; Manjón Herrera, Francisco Javier; Ortiz, H. M.; Pérez González, E.; López Solano, Javier; Rodríguez Hernández, Plácida; Múñoz, Alfonso; Errandonea, Daniel; Ursaki, V.; Tiginyanu, Ivan (American Chemical Society, 2013-08)

We report on Raman scattering measurements in mercury digallium selenide (HgGa2Se4) up to 25 GPa. We also performed, for the low-pressure defect-chalcopyrite structure, lattice-dynamics ab initio calculations at high ...
Orpiment under compression: metavalent bonding at high pressure

Cuenca-Gotor, Vanesa Paula; Sans-Tresserras, Juan Ángel; Gomis, O.; Mujica, Andres; Radescu, Silvana; Muñoz, Alfonso; Rodríguez-Hernández, Plácida; Da Silva, Estelina Lora; Popescu, Catalin; Ibañez, Jordi; Vilaplana Cerda, Rosario Isabel; Manjón, Francisco-Javier (The Royal Society of Chemistry, 2020-02-14)

[EN] We report a joint experimental and theoretical study of the structural, vibrational, and electronic properties of layered monoclinic arsenic sulfide crystals (a-As2S3), aka mineral orpiment, under compression. X-ray ...
Raman scattering study of bulk and nanocrystalline PbMoO4 at high pressures

Vilaplana Cerda, Rosario Isabel; Gomis Hilario, Oscar; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, P.; Muñoz, Alfonso; Errandonea, Daniel; Achary, S.N.; Tyagi, A.K. (American Institute of Physics (AIP), 2012-11-21)

High-pressure Raman scattering measurements have been performed in wulfenite (PbMoO4) for both bulk and nanocrystalline powders up to 22 GPa. Our Raman scattering measurements evidence the phase transition from the tetragonal ...
Structural, vibrational and electronic properties of alpha'-Ga2S3 under compression

Gallego-Parra, Samuel; Vilaplana Cerda, Rosario Isabel; Gomis, O.; Lora da Silva, E.; Otero-de-la-Roza, A.; Rodríguez-Hernández, P.; Muñoz, A.; González, J.; Sans-Tresserras, Juan Ángel; Cuenca-Gotor, Vanesa Paula; Ibáñez, J.; Popescu, C.; Manjón, Francisco-Javier (The Royal Society of Chemistry, 2021-03-21)

[EN] We report a joint experimental and theoretical study of the low-pressure phase of ¿¿-Ga2S3 under compression. Theoretical ab initio calculations have been compared to X-ray diffraction and Raman scattering measurements ...
Structural, vibrational, and electronic behavior of two GaGeTe polytypes under compression

Bandiello, Enrico; Gallego-Parra, Samuel; Liang, A.; Sans-Tresserras, Juan Ángel; Cuenca-Gotor, Vanesa Paula; Lora da Silva, E.; Vilaplana Cerda, Rosario Isabel; Rodríguez-Hernández, P.; Muñoz, A.; Diaz-Anichtchenko, D.; Popescu, C.; Alabarse, F.G.; Rudamas, C.; Drasar, C.; Segura, A.; Manjón, Francisco-Javier (Elsevier, 2023-08)

[EN] GaGeTe is a layered topological semimetal that has been recently found to exist in at least two different polytypes, a-GaGeTe (R3m) and b-GaGeTe (P63mc). Here we report a joint experimental and theoretical study of ...
Structural, Vibrational, and Electronic Study of Sb2S3 at High Pressure

Ibáñez, Jordi; Sans-Tresserras, Juan Ángel; Popescu, Catalin; López-Vidrier, J.; Elvira-Betanzos, J.J.; Cuenca Gotor, Vanesa Paula; Gomis, O.; Manjón Herrera, Francisco Javier; Rodríguez-Hernández, P.; Muñoz, Alfonso (American Chemical Society, 2016-04)

Antimony trisulfide (Sb2S3), found in nature as the mineral stibnite, has been studied under compression at room temperature from a joint experimental and theoretical perspective. X-ray diffraction and Raman scattering ...
Unveiling the role of the lone electron pair in sesquioxides at high pressure: compressibility of beta-Sb2O3

Sans-Tresserras, Juan Ángel; Manjón, Francisco-Javier; Pereira, Andre Luis de Jesus; Ruiz-Fuertes, Javier; Popescu, Catalin; Muñoz, Alfonso; Rodríguez-Hernández, Plácida; Pellicer-Porres, Julio; Cuenca-Gotor, Vanesa Paula; Contreras-García, Julia; Ibañez, Jordi; Monteseguro, Virginia (Royal Society of Chemistry, 2021-04-28)

[EN] The structural, vibrational and electronic properties of the compressed ß-Sb2O3 polymorph, a.k.a. mineral valentinite, have been investigated in a joint experimental and theoretical study up to 23 GPa. The compressibility ...
Vibrational and elastic properties of As4O6 and As4O6·2He at high pressures: Study of dynamical and mechanical stability

Cuenca Gotor, Vanesa Paula; Gomis, O.; Sans-Tresserras, Juan Ángel; Manjón Herrera, Francisco Javier; Rodríguez Hernández, P.; Muñoz, A. (AIP Publishing, 2016-10)

The formation of a new compound with stoichiometry As4O62He at relatively low pressure (3 GPa) has been recently reported when arsenolite (As4O6) powder is compressed with helium as a pressure-transmitting medium. In ...
ZnO-based spinels grown by electrodeposition

Tortosa Jorques, María Dolores; Manjón Herrera, Francisco Javier; Mollar García, Miguel Alfonso; Marí Soucase, Bernabé (Elsevier, 2012-09)

We report on the synthesis of thin films of ZnCo 2O 4 and ZnMn 2O 4 spinels, as well as pure Co 3O 4 and Mn 3O 4 spinels, by means of electrodeposition. Spinel thin films have been analyzed by energy dispersive spectroscopy, ...