91 citations · 326 across the 11 of their papers we have counts for
12 papers
Effect of glass stability on the low frequency vibrations of vapor deposited glasses
I. Festi, E. Alfinelli, D. Bessas +8
Ultra-stable glasses prepared from the physical vapor deposition of organic molecules present a very low density of two-level states, the kind of glass defects that determine their…
X-ray photo-induced atomic motion in Phase Change Materials and conventional covalent chalcogenide glasses
Irene Festi, Antoine Cornet, Tomoki Fujita +10
X-ray Photon Correlation Spectroscopy (XPCS) enables direct access to atomic-scale dynamics in disordered materials, revealing both spontaneous and X-ray-induced relaxation process…
Boson peak in covalent network glasses: Isostaticity and marginal stability
Hideyuki Mizuno, Tatsuya Mori, Giacomo Baldi +1
The boson peak (BP) stands as a key feature in understanding glasses and amorphous materials. It directly underlies their anomalous material properties, including thermal behaviors…
Extreme ultraviolet transient gratings: A tool for nanoscale photoacoustics
L. Foglia, R. Mincigrucci, A. A. Maznev +23
Collective lattice dynamics determine essential aspects of condensed matter, such as elastic and thermal properties. These exhibit strong dependence on the length-scale, reflecting…
Vibrational dynamics of non-crystalline solids
Giacomo Baldi, Aldo Fontana, Giulio Monaco
The boson peak (BP) is an excess of vibrational states over the Debye law appearing at terahertz frequencies. It is found in all glasses and marks the crossover between the long-wa…
Relaxation dynamics induced in glasses by the absorption of hard X-ray photons
Giovanna Pintori, Giacomo Baldi, Beatrice Ruta +1
X-ray photon correlation is used to probe the slow dynamics of the glass-former B2O3 across the glass transition. In the undercooled liquid phase the decay times of the measured co…
Hard X-rays as pump and probe of atomic motion in oxide glasses
B. Ruta, F. Zontone, Y. Chushkin +5
Nowadays powerful X-ray sources like synchrotrons and free-electron lasers are considered as ultimate tools for probing microscopic properties in materials. However, the correct in…
Controlling the dynamics of a bidimensional gel above and below its percolation transition
D. Orsi, B. Ruta, Y. Chushkin +5
The morphology and the microscopic internal dynamics of a bidimensional gel formed by spontaneous aggregation of gold nanoparticles confined at the water surface are investigated b…
Compressed correlation functions and fast aging dynamics in metallic glasses
B. Ruta, G. Baldi, G. Monaco +1
We present x-ray photon correlation spectroscopy measurements of the atomic dynamics in a Zr67Ni33 metallic glass, well below its glass transition temperature. We find that the dec…
Heterogeneous and anisotropic dynamics of a 2D gel
D. Orsi, L. Cristofolini, G. Baldi +1
We report X-ray Photon Correlation Spectroscopy (XPCS) results on a bidimensional (2D) gel formed by a Langmuir monolayer of gold nanoparticles. The system allows an experimental d…
Vibrational excitations in systems with correlated disorder
W. Schirmacher, B. Schmid, C. Tomaras +4
We investigate a -dimensional model ( = 2,3) for sound waves in a disordered environment, in which the local fluctuations of the elastic modulus are spatially correlated with…
The Raman coupling function in disordered solids: a light and neutron scattering study on glasses of different fragility
A. Fontana, F. Rossi, G. Viliani +2
We report new inelastic Raman and neutron scattering spectra for glasses with different degrees of fragility; the data are compared for each sample to obtain the Raman coupling fun…