| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Saviot, Lucien
Laboratoire Interdisciplinaire Carnot de Bourgogne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Sensitivity of Localized Surface Plasmon Resonance and Acoustic Vibrations to Edge Rounding in Silver Nanocubescitations
- 2023Visible-light photocatalytic degradation of dyes by TiO2 -Au inverse opal films synthesized by Atomic Layer Depositioncitations
- 2022Mechanosynthesis of carbonate and lithium co-substituted hydroxyfluorapatitecitations
- 2022Mechanosynthesis of carbonate and lithium co-substituted hydroxyfluorapatitecitations
- 2019Iron oxide-based nanostructured ceramics with tailored magnetic and mechanical properties: Development of mechanically robust, bulk superparamagnetic materials
- 2019Iron oxide-based nanostructured ceramics with tailored magnetic and mechanical properties: development of mechanically robust, bulk superparamagnetic materialscitations
- 2017Direct Writing on Copper Ion Doped Silica Films by Electrogeneration of Metallic Microstructurescitations
- 2013Poisson ratio and excess low-frequency vibrational states in glassescitations
- 2013THz nanocrystal acoustic vibrations from ZrO2 3D supercrystalscitations
- 2012Growth of glass-embedded Cu nanoparticles: A low-frequency Raman scattering studycitations
- 2011Dielectric properties and Raman spectroscopy in Ca-substituted Na0.5Bi0.5TiO3 ferroelectric ceramicscitations
- 2008Surface enhanced Raman scattering of silver sensitized cobalt nanoparticles in metal–dielectric nanocompositescitations
- 2008Surface enhanced Raman scattering of silver sensitized cobalt nanoparticles in metal–dielectric nanocompositescitations
- 2007Polarizability calculation of vibrating nanoparticles for intensity of low wavenumber Raman scatteringcitations
Places of action
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article
Poisson ratio and excess low-frequency vibrational states in glasses
Abstract
In glass, starting from a dependence of the Angell's fragility on the Poisson ratio [V. N. Novikov and A. P. Sokolov, Nature 431, 961 (2004)], and a dependence of the Poisson ratio on the atomic packing density [G. N. Greaves et al., Nat. Mater. 10, 823 (2011)], we propose that the heterogeneities are predominantly density fluctuations in strong glasses (lower Poisson ratio) and shear elasticity fluctuations in fragile glasses (higher Poisson ratio). Because the excess of low-frequency vibration modes in comparison with the Debye regime (boson peak) is strongly connected to these fluctuations, we propose that they are breathing-like (with change of volume) in strong glasses and shear-like (without change of volume) in fragile glasses. As a verification, it is confirmed that the excess modes in the strong silica glass are predominantly breathing-like. Moreover, it is shown that the excess breathing-like modes in a strong polymeric glass are replaced by shear-like modes under hydrostatic pressure as the glass becomes more compact.