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►【软物质物理重点实验室系列学术报告（142-2）】

报告题目：The Soret effect in glassforming liquids

报告人：Prof. Juergen Horbach (Heinrich-Heine-Universität Düsseldorf)

报告地点：中国科学院物理研究所M楼253会议室

报告时间：2019年09月27日（星期五）

ABSTRACT: 

The Soret effect, i.e. the flow of matter caused by a temperature gradient, is studied in a glass-forming binary Lennard-Jones (LJ) mixture, using non-equilibrium molecular dynamics computer simulation. The transport processes associated with this effect are thermal diffusion and interdiffusion. While interdiffusion processes exhibit a drastic slowing down when approaching the glass transition, thermal diffusion appears to be a fast process even in the glass.  We show that the Soret effect becomes more pronounced in the vicinity of the glass transition, due to the decoupling between thermal diffusion and interdiffusion as well as the chemical ordering in the considered LJ mixture. This is reflected in the occurrence of large concentration gradients, nonlinear concentration profiles, and long-lived non-stationary structures.