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Slow processes in supercooled o-terphenyl: relaxation and decoupling.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Saito, Makina Kitao, Shinji Kobayashi, Yasuhiro Kurokuzu, Masayuki Yoda, Yoshitaka Seto, Makoto |
| Copyright Year | 2012 |
| Abstract | We mapped the relaxation times of inter- and intramolecular correlations in o-terphenyl by a quasielastic scattering method using nuclear resonant scattering of synchrotron radiation. From the obtained map, we found that the slow β process is decoupled from the α process at 278 K, and this temperature is clearly below the previous decoupling temperature of 290 K, at which the α-relaxation dynamics changes. Then, it was also concluded that sufficient solidlike condition achieved by further cooling from 290 K is required to decouple the slow β process from the α process and, due to the difference of the length scales between the α and the slow β processes, these two averaged relaxation times are concluded not to cross as an extrapolation assumed so far. Furthermore, evidence of the restricted dynamics of the slow β process could be obtained as an anomalous momentum transfer (q) dependence of ( ∝q(-2.9)) at 265 K, observed at q values of 18-48 nm(-1). |
| Starting Page | 115705 |
| Ending Page | 115705 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/159735/1/PhysRevLett.109.115705.pdf |
| PubMed reference number | 23005649v1 |
| Volume Number | 109 |
| Issue Number | 11 |
| Journal | Physical review letters |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Assumed Cool - action Synchrotrons Terphenyl Compounds |
| Content Type | Text |
| Resource Type | Article |
