Zobrazeno 1 - 10
of 86
pro vyhledávání: '"R. Fouret"'
Autor:
Patrick Derollez, Ch. Hubert, J. Łażewski, Stefan Klotz, R. Fouret, J. González, B. Hennion, Markus Braden, F. Meducin
Publikováno v:
physica status solidi (b). 235:331-336
The pressure dependence of the transverse acoustic (TA) phonons along [100] and [001] and the low-frequency optical A 3 modes of AgGaSe 2 has been measured at pressures to 4.3 GPa by inelastic neutron scattering. We find an exceptionally strong frequ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dffe51a415a179d59c2db32bda8e9a12
https://doi.org/10.1002/pssb.200301581
https://doi.org/10.1002/pssb.200301581
Autor:
J. Ażewski, Patrick Derollez, Bernard Hennion, Markus Braden, R. Fouret, Stefan Klotz, J. González
Publikováno v:
High Pressure Research. 22:283-286
The pressure dependence of the transverse acoustic TA[0 0 1] and TA[1 0 0] phonons and the low-frequency optical v 3 phonons of AgGaSe 2 has been measured at pressures up to 4.3 GPa by inelastic neutron scattering. The strong frequency decreases in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::706f81f2d91f41ad1691409418f26c4e
https://doi.org/10.1080/08957950212782
https://doi.org/10.1080/08957950212782
Publikováno v:
Physica B: Condensed Matter. 305:191-196
We have measured the thermal expansion coefficients and the temperature dependence of the optical low-frequency M 5 and TA[M] acoustic modes at the edge-of-zone [1 0 0] of AgGaSe 2 by neutron scattering. The variations of the phonon frequencies with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c11315475a9da4f1756a7c1ecb6be002
https://doi.org/10.1016/s0921-4526(01)00610-x
https://doi.org/10.1016/s0921-4526(01)00610-x
Publikováno v:
Journal of Physics: Condensed Matter. 11:9665-9671
The structure and lattice dynamics of CuInSe2 were studied using ab initio calculations. The phonon dispersion relations and phonon density of states were calculated using the direct method. The results are in good agreement with recently obtained in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da020467a3274742424cf89c0bf0a528
https://doi.org/10.1088/0953-8984/11/48/323
https://doi.org/10.1088/0953-8984/11/48/323
Publikováno v:
Physical Review E. 59:4143-4152
There is no fundamental reason that nonchiral liquid crystals should not be ferroelectric. In this paper nonchiral flexoelectric effects (particularly leading to the specific orientation phenomena for smectic films in electric fields) are investigate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b6b6bdd3222c4c06f3e0fa1b3831bd0
https://doi.org/10.1103/physreve.59.4143
https://doi.org/10.1103/physreve.59.4143
Publikováno v:
Journal of Physics: Condensed Matter. 11:3987-3995
The phonon dispersion curves along the [100] and [001] directions of CuInSe2 have been measured by inelastic neutron scattering. The neutron measurements reveal the uncertainty of optical measurements because of the large absorption of this material.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fa5bc3ea1fa9270ce02c11917c27028
https://doi.org/10.1088/0953-8984/11/20/305
https://doi.org/10.1088/0953-8984/11/20/305
Publikováno v:
Journal of Experimental and Theoretical Physics Letters. 67:856-862
Free-standing films of nonchiral liquid crystal compound are studied by optical reflectivity measurements. The existence of macroscopic ferroelectric properties and orientation of the tilt plane parallel to an electric field in the temperature range
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9e45edac3eecf692264daf1ed0dd084
https://doi.org/10.1134/1.567761
https://doi.org/10.1134/1.567761
Publikováno v:
Journal of Physics: Condensed Matter. 9:6579-6589
The dispersion curves along the directions [100] and [001] of have been measured by inelastic neutron scattering. The results are analysed with different rigid-ion models: Born - von Karman and valence force field models, which give a good agreement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::32c02c8bf465a6b270267e7c5c290a1e
https://doi.org/10.1088/0953-8984/9/31/011
https://doi.org/10.1088/0953-8984/9/31/011
Publikováno v:
Journal de Physique II. 7:1-6
Optical transmission spectrum measurements in an electric field are used to study the short-range structure of the blue phase III (BPIII). The data are compared with the theoretical models for BPIII. Our results can be explained by the models in whic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1a2bdb4ac4a2085fb230dbcd7f1aaef
https://doi.org/10.1051/jp2:1997111
https://doi.org/10.1051/jp2:1997111
Publikováno v:
Physics Letters A. 220:242-246
Optical reflectivity of free-standing films in the temperature interval of the smectic phases and above the bulk smectic-nematic transition temperature has been studied. Melting phenomena have been found to be dependent on the film thickness. For thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e41dfda5dc759092a41e45f871859fc4
https://doi.org/10.1016/0375-9601(96)00498-7
https://doi.org/10.1016/0375-9601(96)00498-7