Breakdown of the Rosenfeld Excess Entropy Scaling Relations for the Core-Softened Systems: Thermodynamic Path Dependence

TL;DR

This paper investigates how the Rosenfeld excess entropy scaling relations for diffusion coefficients in core-softened systems depend on the thermodynamic path, showing validity along isochors but not along isotherms.

Contribution

It reveals the path-dependent validity of Rosenfeld scaling in water-like anomalous systems with core-softened potentials.

Findings

Rosenfeld scaling holds along isochors.

Rosenfeld scaling breaks down along isotherms.

Thermodynamic path influences the applicability of entropy scaling relations.

Abstract

We analyze the applicability of the Rosenfeld entropy scaling relations to the systems with the core-softened potentials demonstrating the water-like anomalies. It is shown that the validity of the of Rosenfeld scaling relation for the diffusion coefficient depends on the thermodynamic path which is used for the calculations of the kinetic coefficients and the excess entropy. In particular, it is valid along isochors, but it breaks down along isotherms.