An Enhanced Sampling Approach for Computing the Free Energy of Solid Surface and Solid–Liquid Interface

Cao Thang Nguyen, Duc Tam Ho, Sung Youb Kim*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Free energies of a solid surface and a solid–liquid interface play significant roles in thermodynamics. Due to the limited availability of experimental data, computational methods offer effective alternatives for calculating these properties. This study adopts advanced frameworks of the logarithmic mean force dynamics method to present an enhanced sampling approach for the calculation of the free energy at different temperatures. To achieve this, the free energy profile is constructed along with a pre-established collective variable within the melting transition and cleavage processes. The values of the solid surface and solid–liquid interface free energies are then extrapolated from the excess free energy related to the formation and persistence of the solid surface or the solid–liquid interface. Furthermore, this methodology is employed to calculate the temperature dependence of the free energy measurements for the (100) and (110) surfaces and interfaces of Cu. It is shown that this methodology is robust and readily applicable in contemporary models of atomic interactions and various systems.

Original languageEnglish
Article number2300538
Pages (from-to)1-7
Number of pages7
JournalAdvanced Theory and Simulations
Volume7
Issue number1
Early online date22 Oct 2023
DOIs
Publication statusPublished - 1 Jan 2024

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