Experimental Observation of a Nearly Logarithmic Decay of the Orientational Correlation Function in Supercooled Liquids on the Picosecond-to-Nanosecond Time Scales
Dynamics of five supercooled molecular liquids have been studied using optical heterodyne detected optical Kerr effect experiments. "Intermediate" time scale power law decays (approximately 2 ps to 1-10 ns) with temperature independent exponents close to -1 have been observed in all five s...
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| Vydáno v: | Physical review letters Ročník 90; číslo 19; s. 197401 |
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| Médium: | Journal Article |
| Jazyk: | angličtina |
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United States
16.05.2003
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| ISSN: | 0031-9007, 1079-7114 |
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| Abstract | Dynamics of five supercooled molecular liquids have been studied using optical heterodyne detected optical Kerr effect experiments. "Intermediate" time scale power law decays (approximately 2 ps to 1-10 ns) with temperature independent exponents close to -1 have been observed in all five samples from high temperature to approximately T(c), the mode-coupling theory (MCT) critical temperature. The amplitude of the intermediate power law increases with temperature as [(T-T(c))/T(c)](1/2). The results cannot be explained by standard MCT, and one possible explanation within MCT would require the higher order singularity scenario, thought to be highly improbable, to be virtually universal. |
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| AbstractList | Dynamics of five supercooled molecular liquids have been studied using optical heterodyne detected optical Kerr effect experiments. "Intermediate" time scale power law decays (approximately 2 ps to 1-10 ns) with temperature independent exponents close to -1 have been observed in all five samples from high temperature to approximately T(c), the mode-coupling theory (MCT) critical temperature. The amplitude of the intermediate power law increases with temperature as [(T-T(c))/T(c)](1/2). The results cannot be explained by standard MCT, and one possible explanation within MCT would require the higher order singularity scenario, thought to be highly improbable, to be virtually universal. Dynamics of five supercooled molecular liquids have been studied using optical heterodyne detected optical Kerr effect experiments. "Intermediate" time scale power law decays (approximately 2 ps to 1-10 ns) with temperature independent exponents close to -1 have been observed in all five samples from high temperature to approximately T(c), the mode-coupling theory (MCT) critical temperature. The amplitude of the intermediate power law increases with temperature as [(T-T(c))/T(c)](1/2). The results cannot be explained by standard MCT, and one possible explanation within MCT would require the higher order singularity scenario, thought to be highly improbable, to be virtually universal.Dynamics of five supercooled molecular liquids have been studied using optical heterodyne detected optical Kerr effect experiments. "Intermediate" time scale power law decays (approximately 2 ps to 1-10 ns) with temperature independent exponents close to -1 have been observed in all five samples from high temperature to approximately T(c), the mode-coupling theory (MCT) critical temperature. The amplitude of the intermediate power law increases with temperature as [(T-T(c))/T(c)](1/2). The results cannot be explained by standard MCT, and one possible explanation within MCT would require the higher order singularity scenario, thought to be highly improbable, to be virtually universal. |
| ArticleNumber | 197401 |
| Author | Cang, Hu Novikov, V. N. Fayer, M. D. |
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| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/12785982$$D View this record in MEDLINE/PubMed |
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| Cites_doi | 10.1088/0034-4885/55/3/001 10.1103/PhysRevE.59.5706 10.1126/science.267.5206.1924 10.1063/1.1287595 10.1021/jp002949d 10.1088/0953-8984/2/42/025 10.1103/PhysRevE.63.011401 10.1063/1.1427711 10.1103/PhysRevLett.88.125902 10.1002/1099-0488(20001101)38:21<2785::AID-POLB70>3.0.CO;2-S 10.1103/PhysRevLett.77.318 10.1103/PhysRevLett.88.098301 10.1103/PhysRevE.60.2430 10.1103/PhysRevE.66.011405 10.1103/PhysRevLett.84.5431 10.1080/01442350110092701 10.1007/BF01312829 |
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| References | PhysRevLett.90.197401Cc12R1 PhysRevLett.90.197401Cc11R1 PhysRevLett.90.197401Cc14R1 PhysRevLett.90.197401Cc13R1 PhysRevLett.90.197401Cc16R1 PhysRevLett.90.197401Cc15R1 PhysRevLett.90.197401Cc17R1 W. Götze (PhysRevLett.90.197401Cc9R1) 1989 PhysRevLett.90.197401Cc10R1 PhysRevLett.90.197401Cc7R1 PhysRevLett.90.197401Cc6R1 PhysRevLett.90.197401Cc8R1 PhysRevLett.90.197401Cc3R1 W. Götze (PhysRevLett.90.197401Cc18R1) 1988; 72 PhysRevLett.90.197401Cc2R1 PhysRevLett.90.197401Cc5R1 C. A. Angell (PhysRevLett.90.197401Cc1R1) 1995; 267 PhysRevLett.90.197401Cc4R1 |
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| Title | Experimental Observation of a Nearly Logarithmic Decay of the Orientational Correlation Function in Supercooled Liquids on the Picosecond-to-Nanosecond Time Scales |
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