Skip to Main content Skip to Navigation
Journal articles

Communication: Truncated non-bonded potentials can yield unphysical behavior in molecular dynamics simulations of interfaces

Abstract : Non-bonded potentials are included in most force fields and therefore widely used in classical molecular dynamics simulations of materials and interfacial phenomena. It is commonplace to truncate these potentials for computational efficiency based on the assumption that errors are negligible for reasonable cutoffs or compensated for by adjusting other interaction parameters. Arising from a metadynamics study of the wetting transition of water on a solid substrate, we find that the influence of the cutoff is unexpectedly strong and can change the character of the wetting transition from continuous to first order by creating artificial metastable wetting states. Common cutoff corrections such as the use of a force switching function, a shifted potential, or a shifted force do not avoid this. Such a qualitative difference urges caution and suggests that using truncated non-bonded potentials can induce unphysical behavior that cannot be fully accounted for by adjusting other interaction parameters.
Document type :
Journal articles
Complete list of metadata

https://hal-univ-lyon1.archives-ouvertes.fr/hal-02289278
Contributor : Depot 3 Lyon 1 Connect in order to contact the contributor
Submitted on : Friday, January 22, 2021 - 11:49:20 AM
Last modification on : Tuesday, September 28, 2021 - 2:48:04 PM
Long-term archiving on: : Friday, April 23, 2021 - 7:01:55 PM

File

1.4997698.pdf
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Martin Fitzner, Laurent Joly, Ming Ma, Gabriele C. Sosso, Andrea Zen, et al.. Communication: Truncated non-bonded potentials can yield unphysical behavior in molecular dynamics simulations of interfaces. Journal of Chemical Physics, American Institute of Physics, 2017, 147 (12), pp.121102. ⟨10.1063/1.4997698⟩. ⟨hal-02289278⟩

Share

Metrics

Record views

79

Files downloads

50