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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics

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SMC-X: A Distributed, Scalable Monte Carlo Simulation Method for Chemically Complex Alloys.

Xianglin Liu¹, Kai Yang¹, Fanli Zhou²

¹Pengcheng Laboratory, Shenzhen 518000, China.

Journal of Chemical Theory and Computation

|December 9, 2025

Summary

This summary is machine-generated.

We enhanced the SMC-X simulation method for complex alloys, achieving unprecedented scales. This breakthrough aids in understanding high-entropy materials and bridging simulation with experimental results.

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Area of Science:

Materials Science
Computational Materials Science
Alloy Chemistry

Background:

Predicting chemical evolution in multicomponent alloys requires atomistic simulations at large scales.
Current methods face limitations in spatial and temporal resolution for complex alloy systems.

Purpose of the Study:

To advance the Scalable Monte Carlo with eXtended interactions (SMC-X) method for enhanced atomistic simulations.
To achieve unprecedented spatial and temporal scales in simulating chemically complex alloys.
To bridge the gap between experimental observations and theoretical predictions in high-entropy alloys (HEAs).

Main Methods:

Distributed computation utilizing Graphics Processing Units (GPUs) or Central Processing Units (CPUs).
Application of the advanced SMC-X method to simulate large-scale high-entropy alloy systems.
Analysis of simulation results using Lifshitz-Slyozov-Wagner (LSW) theory for coarsening dynamics.

Main Results:

Simulated a record 128-billion-atom high-entropy alloy (HEA) system reaching the micrometer scale.
Simulated a 1-billion-atom HEA system over three million Monte Carlo steps, approaching minute-scale evolution.
Demonstrated the necessity of large-scale simulations for accurate prediction of nanoprecipitate sizes in HEAs.

Conclusions:

The enhanced SMC-X method significantly pushes the boundaries of atomistic simulations for complex alloys.
Large-scale simulations are crucial for validating theoretical models against experimental data in HEAs.
SMC-X shows great potential for simulation-driven discovery in high-entropy materials research.