两种竞争吸附质的动态润湿
Dynamic wetting with two competing adsorbates
摘要：
研究了两种竞争吸附物在平面基底上润湿的动力学性质。这两种粒子具有相同的性质，并且相互排斥。从一个平坦的界面开始，人们观察到由非湿区域分离的相应类型的均匀液滴的形成，其中界面保持被钉扎。湿相的特征在于竞争液滴的缓慢粗化。此外，在2+1维的连续相变的附加线出现在绑定相，它从一个有序的无序相分离。粒子类型互换下的对称性在该区域自发破缺，并且有限系统呈现两个亚稳态，每个亚稳定态由其中一个物种支配。通过数值模拟分析了这种转变的临界特性。
英文摘要：
We study the dynamic properties of a model for wetting with two competing adsorbates on a planar substrate. The two species of particles have identical properties and repel each other. Starting with a flat interface one observes the formation of homogeneous droplets of the respective type separated by nonwet regions where the interface remains pinned. The wet phase is characterized by slow coarsening of competing droplets. Moreover, in 2+1 dimensions an additional line of continuous phase transition emerges in the bound phase, which separates an unordered phase from an ordered one. The symmetry under interchange of the particle types is spontaneously broken in this region and finite systems exhibit two metastable states, each dominated by one of the species. The critical properties of this transition are analyzed by numeric simulations.
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