TY - JOUR
T1 - Nature of the non-exponential primary relaxation in structural glass-formers probed by dynamically selective experiments
AU - Böhmer, R.
AU - Chamberlin, Ralph
AU - Diezemann, G.
AU - Geil, B.
AU - Heuer, A.
AU - Hinze, G.
AU - Kuebler, S. C.
AU - Richert, Ranko
AU - Schiener, B.
AU - Sillescu, H.
AU - Spiess, H. W.
AU - Tracht, U.
AU - Wilhelm, M.
N1 - Funding Information:
Research in Mainz was supported by the Deutsche Forschungsgemeinschaft (SFB 262). One of us (R.V.C.) also acknowledges financial support by the NSF under grant DMR 9701740.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1998/8/2
Y1 - 1998/8/2
N2 - Several experimental methods feature the potential to distinguish between slow and fast contributions to the non-exponential, ensemble averaged primary response in glass-forming materials. Some of these techniques are based on the selection of subensembles using multi-dimensional nuclear magnetic resonance, optical bleaching, and non-resonant spectral hole burning. Others, such as the time-dependent solvation spectroscopy, measure microscopic responses induced by local perturbations. Using several of these methods it could be demonstrated for various glass-forming materials that the non-exponential relaxation results from a superposition of dynamically distinguishable entities. The experimental observation that subensembles can be selected efficiently indicates a large degree of heterogeneity. The intrinsic response is compatible with single exponential relaxation.
AB - Several experimental methods feature the potential to distinguish between slow and fast contributions to the non-exponential, ensemble averaged primary response in glass-forming materials. Some of these techniques are based on the selection of subensembles using multi-dimensional nuclear magnetic resonance, optical bleaching, and non-resonant spectral hole burning. Others, such as the time-dependent solvation spectroscopy, measure microscopic responses induced by local perturbations. Using several of these methods it could be demonstrated for various glass-forming materials that the non-exponential relaxation results from a superposition of dynamically distinguishable entities. The experimental observation that subensembles can be selected efficiently indicates a large degree of heterogeneity. The intrinsic response is compatible with single exponential relaxation.
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U2 - 10.1016/S0022-3093(98)00581-X
DO - 10.1016/S0022-3093(98)00581-X
M3 - Article
AN - SCOPUS:0038404375
VL - 235-237
SP - 1
EP - 9
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
ER -