Appignanesi G A, Rodríguez Fris J A, Frechero M A
Laboratorio de Fisicoquímica, Departamento de Química, Universidad Nacional del Sur, Avenida Alem 1253, 8000 Bahía Blanca, Argentina.
Phys Rev Lett. 2006 Jun 16;96(23):237803. doi: 10.1103/PhysRevLett.96.237803. Epub 2006 Jun 15.
The discovery that the propensity for particle motion in a supercooled liquid is completely determined by the initial structure pointed to the existence of a causal link between structure and dynamics in glassy systems. Here we demonstrate that this underlying influence of structure is only local in time, fading out beyond the metabasin lifetime much before the relaxation time. Thus, our results reveal the irreproducibility of metabasin dynamics and support the scenario of a random walk on metabasins for the long time diffusion.
过冷液体中粒子运动倾向完全由初始结构决定这一发现，表明玻璃态系统中结构与动力学之间存在因果联系。在此我们证明，结构的这种潜在影响仅在时间上是局部的，在弛豫时间之前很久就会在亚盆地寿命之外逐渐消失。因此，我们的结果揭示了亚盆地动力学的不可重复性，并支持了长时间扩散中亚盆地随机游走的情景。
