It is widely known that the low-temperature physical properties, such as the heat capacity and thermal conductivity, of a disordered amorphous solid are markedly different from those of its ordered crystalline
We argue that the intrinsic glassy degrees of freedom in amorphous solids giving rise to the thermal conductivity plateau and the "boson peak" in the heat capacity at moderately low temperatures are directly connected to those motions giving rise to the twolevel-like excitations seen at still ...
In particular, experimental data relative to the Boson peak integrated intensity and computer simulations on three-dimensional site percolators, allow us to infer that the relevant mechanism that produces the peak is disorder-induced light scattering from acoustic modes of a disordered structure.doi:...
Disorder-induced Light Scattering in Solids: The Origin of the Boson Peak in Glasses. Philos. Mag. B 1995, 71, 761-769.Bogdanova S, Pajera I, ... S Bogdanova,I Pajeva,P Nikolova,... - 《Pharmaceutical Research》 被引量: 97发表: 2005年 A model of low‐frequency Raman scattering in...
9b). Their results confirmed the hypothesis that structural changes in amorphous alloys can occur even under elastic strain and lead to permanent deformation. This hypothesis was also confirmed experimentally by measuring the strain of the as-cast sample during CEL at 90% σy followed by unloading...
The predicted temperatures of the maximum homogeneous nucleation rates are located well below their glass transition temperatures (Tg), in a region of very high viscosity, which leads to extremely long nucleation time-lags and low nucleation rates. This behaviour is due to the remarkably small ...
Benassi P, Fontana A, Frizzera W, Montagna M, Mazzacurati V, Signorelli G. Disorder- induced light scattering in solids: The origin of the Boson peak in glasses. Phil Mag B 1995; 71:761-9P. Benassi, A. Fontana, W. Frizzera, M. Montagna, V. Mazzacurati, G. Signorelli, Disorder-...
This seems to be a universal characteristic for quasi-two dimensional random networks, which are used to model the protein dynamics. This interpretation makes explicit contact with well established models for the boson-peak anomaly in glasses and/or amorphous solids....
A theoretical 'complete soft-mode-dynamics' model of the origin and properties of the boson peak accompanied by a high-frequency sound, observed in glasses of a certain type, is described. The origin is determined by interaction of non-acoustic vibrations with acoustic phonons and a Ioffe–...
It considers the effect of the electroweak force on the distribution of negativekinetic-energy neutrinos, which fills the whole universe (neutrino Fermi sea). The large weak-boson masses appear to be a direct consequence of the vanishing neutrino mass....