Physical Review Letters · 2007 · 103 citations · 24 references
Natural SciencesPhysicsCondensed Matter PhysicsMolecular PhysicsVibrationContinuum MechanicsElastic DeformationElastic PropertiesElasticity TheoryHigh-pressure ThermodynamicsBrillouin ScatteringCompressionContinuum ElasticityDensityInelastic Neutron ScatteringMolecular Vibrational DynamicsPressure-density Relation
We study the changes in the low-frequency vibrational dynamics of poly(isobutylene) under pressure up to 1.4 GPa, corresponding to a density change of 20%. Combining inelastic neutron, x-ray, and Brillouin light scattering, we analyze the variations in the boson peak, transverse and longitudinal sound velocities, and the Debye level under pressure. We find that the boson peak variation under pressure cannot be explained by the elastic continuum transformation only. Surprisingly, the shape of the boson peak remains unchanged even at such high compression.
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Direct Experimental Evidence of a Growing Length Scale Accompanying the Glass Transition
Ludovic Berthier, Giulio Biroli, J. P. Bouchaud et al. · Science · 2005 · 809 citations · Full text
Poisson's ratio and the fragility of glass-forming liquids
V. N. Novikov, Alexei P. Sokolov · Nature · 2004 · 482 citations