Dynamic relaxation is an intrinsic and universal feature of glasses and enables fluctuation
and dissipation to occur, which induces plentiful behaviour, maintains equilibrium, and …

With the ongoing proliferation of terahertz time-domain instrumentation from semiconductor
physics into applied spectroscopy over the past decade, measurements at terahertz …

Since the first observation of synchrotron radiation in 1947, progress in the generation of
electromagnetic radiation using particle accelerators and in experimental methods has …

We compare the atomic dynamics of the glass to that of the relevant crystal. In the spectra of
inelastic scattering, the boson peak of the glass appears higher than the transverse acoustic …

The local elasticity of glasses is known to be inhomogeneous on a microscopic scale
compared to that of crystalline materials. Their vibrational spectrum strongly deviates from …

Using a stable random matrix approach, we consider the diffusion of vibrations in 3 d
harmonic lattices with strong force-constant disorder. Above some frequency ω IR …

The attenuation of long-wavelength phonons (waves) by glassy disorder plays a central role
in various glass anomalies, yet it is neither fully characterized nor fully understood. Of …

We study the temperature dependence of acousticlike excitations measured by means of
inelastic x-ray scattering at terahertz frequencies in silica glass. The apparent sound velocity …

The theory of elasticity with spatially fluctuating elastic constants (heterogeneous-elasticity
theory) is reviewed. It is shown that the vibrational anomalies associated with the boson …

We report the observation, by means of high-resolution inelastic x-ray scattering, of an
unusually large temperature dependence of the sound attenuation of a network glass at …