Anomalous glassy relaxation near the isotropic-nematic phase transition
arXiv:cond-mat/0508055 · doi:10.1103/PhysRevE.71.030701
Abstract
Dynamical heterogeneity in a system of Gay-Berne ellipsoids near its isotropic-nematic (I-N) transition and also in an equimolar mixture of Lennard-Jones spheres and Gay-Berne ellipsoids in deeply supercooled regime is probed by the time evolution of non-Gaussian parameter (NGP). The appearance of a dominant second peak in the rotational NGP near the I-N transition signals the growth of pseudonematic domains. Surprisingly such a second peak is instead observed in the translational NGP for glassy binary mixture. Localization of orientational motion near the I-N transition is found to be responsible for the observed anomalous orientational relaxation.
4 pages, 4 figures
Cited by in corpus (7)
- Computational probes of molecular motion in the Lewis and Whanstrom model for ortho-terphenyl
- Decoupling phenomena in supercooled liquids: Signatures in the energy landscape
- Complete breakdown of the Debye model of rotational relaxation near the isotropic-nematic phase boundary: Effects of intermolecular correlations in orientational dynamics
- How glassy are orientational dynamics of rodlike molecules near the isotropic-nematic transition?
- Power law relaxation and glassy dynamics in Lebwohl-Lasher model near isotropic-nematic phase transition
- Violation of Stokes-Einstein and Stokes-Einstein-Debye relations in polymers at the gas-supercooled liquid coexistence
- How to quantify long-time rotational motion in molecular systems