6533b7d5fe1ef96bd1264948
RESEARCH PRODUCT
Boson peak and hybridization of acoustic modes with vibrations of nanometric heterogeneities in glasses
Alain MermetLucien SaviotEugène Duvalsubject
DiffractionPhysicsCondensed matter physicsIcosahedral symmetryScatteringNeutron diffraction[ PHYS.COND.CM-MS ] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Quasicrystal02 engineering and technology021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesElectromagnetic radiationElectronic Optical and Magnetic Materials0103 physical sciences[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Neutron010306 general physics0210 nano-technologyBosondescription
9 pages; International audience; The low-frequency dynamics in glasses is compared with that in icosahedral quasicrystals. For both arrangements of matter, the existence of nanometric heterogeneities, implying the existence of a nanometric inhomogeneous elastic network, is expected to play a crucial role. Thanks to this comparison, mostly based on inelastic x-ray (neutron) scattering data, it is proposed that the excess of vibrational density of states observed in both materials is due to the hybridization of longitudinal and transverse acoustic modes with modes localized around the heterogeneities.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-02 |