Critical wetting of a class of nonequilibrium interfaces: a computer simulation study

Area of Science:

• Statistical Physics
• Condensed Matter Physics
• Surface Science

Background:

• Understanding wetting phenomena is crucial in various physical and chemical processes.
• Nonequilibrium conditions introduce complexities not captured by equilibrium theories.
• Previous mean-field predictions for critical wetting under these conditions require further investigation.

Purpose of the Study:

• To numerically and analytically study critical wetting transitions under nonequilibrium conditions.
• To characterize the critical behavior using interface-displacement models.
• To compare findings with existing mean-field predictions.

Main Methods:

• Utilizing an interface-displacement model based on the Kardar-Parisi-Zhang equation.
• Incorporating additional terms for a short-ranged attractive wall.
• Performing numerical and analytical investigations to determine critical exponents.

Main Results:

• Detailed characterization of critical behavior, including exponents for average height and surface order-parameter in one dimension.
• Observed qualitative and quantitative differences compared to reported mean-field predictions.
• Demonstrated anomalous scaling of interface local slopes induced by the attractive wall.

Conclusions:

• The study provides a more accurate description of critical wetting under nonequilibrium conditions.
• The presence of an attractive wall significantly alters interface behavior, leading to anomalous scaling.
• Findings challenge and refine existing theoretical models for interfacial phenomena.