257 citations · 808 across the 16 of their papers we have counts for
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Structure and photoinduced effects in elemental chalcogens: A review on Raman scattering
Spyros N. Yannopoulos
Much progress has been made over a long period, spanning more than a century, in understanding the atomic arrangement on various length scales of noncrystalline chalcogens and thei…
Athermal photoelectronic effects in non-crystalline chalcogenides: Current status and beyond
Spyros N. Yannopoulos
The current critical review aims to be more than a simple summary and reproduction of previously published work. Many comprehensive reviews and collections can be found in the lite…
On the origin of the -transition in liquid Sulphur
Tullio Scopigno, Spyros Yannopoulos, Filippo Scarponi +3
Developing a novel experimental technique, we applied photon correlation spectroscopy using infrared radiation in liquid Sulphur around , i.e. in the temperature range where a…
Pressure dependence of the Boson peak in glassy As2S3 studied by Raman Scattering
K. S. Andrikopoulos, D. Christofilos, G. A. Kourouklis +1
A detailed pressure-dependence study of the low-energy excitations of glassy As2S3 is reported over a wide pressure range, up to 10 GPa. The spectral features of Boson peak are ana…
On the analysis of the vibrational Boson peak and low-energy excitations in glasses
S. N. Yannopoulos, K. S. Andrikopoulos, G. Ruocco
Implications of reduction procedures applied to the low energy part of the vibrational density of states in glasses and supercooled liquids are considered by advancing a detailed c…
Poisson's ratio of glass and a liquid's fragility?
Spyros N. Yannopoulos, Gyan P. Johari
The relation between Poisson's ratio of a glass and fragility of a liquid recently proposed is re-examined in light of evaluation of a large number of data available in the literat…
High frequency dynamics in a monatomic glass
T. Scopigno, R. Di Leonardo, G. Ruocco +4
The high frequency dynamics of glassy Selenium has been studied by Inelastic X-ray Scattering at beamline BL35XU (SPring-8). The high quality of the data allows one to pinpoint the…
High frequency acoustic modes in vitreous Beryllium Fluoride probed by inelastic X-ray scattering
T. Scopigno, S. N. Yannopoulos, D. Th. Kastrissios +4
Inelastic X-ray Scattering measurements of the dynamics structure factor have bene performed on vitreous Beryllium Fluoride ({\it v-}BeF) at =297 K in the momentum transfer,…