Two-order-parameter model of the liquid-glass transition. II. Structural relaxation and dynamic heterogeneity

@article{citeulike:2453822, abstract = {We propose that there exist two key temperatures relevant to glass transition: (i) a transition from the ordinary-liquid to the frustrated metastable-liquid (the Griffiths-phase-like) state at , which is characterized by the appearance of metastable high-density solid-like islands and the resulting appearance of the cooperative nature of [alpha] relaxation, and (ii) another transition into the spin-glass-like state and the resulting divergence of the [alpha] relaxation time at T0. is a density-ordering (melting) point of the corresponding hypothetical pure system that is free from disorder effects. Below , a system has a complex free-energy landscape characteristic of the frustrated metastable-liquid state; metastable solid-like islands with different densities coexist and fluctuate dynamically. In our model, the [alpha] mode is associated with dynamics of creation and annihilation of metastable islands below . The metastable solid-like islands are the origin of dynamic heterogeneity. We propose a modified Vogel-Fulcher law, which can phenomenologically describe the Arrhenius/Vogel-Fulcher crossover induced by a transition from the ordinary-liquid to the frustrated metastable-liquid state around . We also argue that the hidden crystalline ordering in metastable islands may cause the change in the structure factor of a supercooled liquid below , which is more enhanced upon cooling.}, author = {Tanaka, Hajime }, citeulike-article-id = {2453822}, doi = {10.1016/j.jnoncrysol.2005.09.009}, journal = {Journal of Non-Crystalline Solids}, keywords = {2005, glass, heterogeneity, model, tanaka, theory}, month = {November}, number = {43-45}, pages = {3385--3395}, posted-at = {2008-03-01 21:35:58}, priority = {2}, title = {Two-order-parameter model of the liquid-glass transition. II. Structural relaxation and dynamic heterogeneity}, url = {http://dx.doi.org/10.1016/j.jnoncrysol.2005.09.009}, volume = {351}, year = {2005} }

TY - JOUR ID - citeulike:2453822 L3 - citeulike-article-id:2453822 TI - Two-order-parameter model of the liquid-glass transition. II. Structural relaxation and dynamic heterogeneity JF - Journal of Non-Crystalline Solids VL - 351 IS - 43-45 SP - 3385 EP - 3395 N2 - We propose that there exist two key temperatures relevant to glass transition: (i) a transition from the ordinary-liquid to the frustrated metastable-liquid (the Griffiths-phase-like) state at , which is characterized by the appearance of metastable high-density solid-like islands and the resulting appearance of the cooperative nature of [alpha] relaxation, and (ii) another transition into the spin-glass-like state and the resulting divergence of the [alpha] relaxation time at T0. is a density-ordering (melting) point of the corresponding hypothetical pure system that is free from disorder effects. Below , a system has a complex free-energy landscape characteristic of the frustrated metastable-liquid state; metastable solid-like islands with different densities coexist and fluctuate dynamically. In our model, the [alpha] mode is associated with dynamics of creation and annihilation of metastable islands below . The metastable solid-like islands are the origin of dynamic heterogeneity. We propose a modified Vogel-Fulcher law, which can phenomenologically describe the Arrhenius/Vogel-Fulcher crossover induced by a transition from the ordinary-liquid to the frustrated metastable-liquid state around . We also argue that the hidden crystalline ordering in metastable islands may cause the change in the structure factor of a supercooled liquid below , which is more enhanced upon cooling. KW - 2005 KW - glass KW - heterogeneity KW - model KW - tanaka KW - theory AU - Tanaka, Hajime PY - 2005/11/01/ UR - http://dx.doi.org/10.1016/j.jnoncrysol.2005.09.009 ER -