TY - JOUR
T1 - The glass transition
T2 - General scenario and crossover temperature
AU - Sokolov, A. P.
PY - 1998/8/2
Y1 - 1998/8/2
N2 - Analysis of light and neutron scattering spectra of both fragile and non-fragile glass forming liquids shows that the glass transition is not a monotonie process, qualitative changes in the dynamics occur at a crossover temperature, Tx. The crossover temperature shows up in many processes and seems to occur for different liquids at approximately the same viscosity (or structural relaxation time). A general scenario for the dynamics of strong and fragile glass forming liquids is discussed. It is shown that at T > Tx it follows, the qualitative scenario suggested by mode-coupling theory (MCT) for the higher temperature region. However, below Tx it does not agree with the asymptotic MCT predictions, not even qualitatively. The importance of a potential energy landscape for the dynamics in this low temperature range (T < Tx) is discussed.
AB - Analysis of light and neutron scattering spectra of both fragile and non-fragile glass forming liquids shows that the glass transition is not a monotonie process, qualitative changes in the dynamics occur at a crossover temperature, Tx. The crossover temperature shows up in many processes and seems to occur for different liquids at approximately the same viscosity (or structural relaxation time). A general scenario for the dynamics of strong and fragile glass forming liquids is discussed. It is shown that at T > Tx it follows, the qualitative scenario suggested by mode-coupling theory (MCT) for the higher temperature region. However, below Tx it does not agree with the asymptotic MCT predictions, not even qualitatively. The importance of a potential energy landscape for the dynamics in this low temperature range (T < Tx) is discussed.
UR - http://www.scopus.com/inward/record.url?scp=0000491808&partnerID=8YFLogxK
U2 - 10.1016/S0022-3093(98)00637-1
DO - 10.1016/S0022-3093(98)00637-1
M3 - Article
AN - SCOPUS:0000491808
SN - 0022-3093
VL - 235-237
SP - 190
EP - 195
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
ER -