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Parametrization of Stillinger–Weber potential based on valence force field model: application to single-layer MoS2and black phosphorus
- Source :
- Nanotechnology. 26:315706
- Publication Year :
- 2015
- Publisher :
- IOP Publishing, 2015.
-
Abstract
- We propose to parametrize the Stillinger-Weber potential for covalent materials starting from the valence force field model. All geometrical parameters in the Stillinger-Weber potential are determined analytically according to the equilibrium condition for each individual potential term, while the energy parameters are derived from the valence force field model. This parametrization approach transfers the accuracy of the valence force field model to the Stillinger-Weber potential. Furthermore, the resulting Stilliinger-Weber potential supports for stable molecular dynamics simulations, as each potential term is at energy minimum state separately at the equilibrium configuration. We employ this procedure to parametrize Stillinger-Weber potentials for the single-layer MoS2 and black phosphorous. The obtained Stillinger-Weber potentials predict accurate phonon spectrum and mechanical behaviors. We also provide input scripts of these Stillinger-Weber potentials used by publicly available simulation packages including GULP and LAMMPS.<br />Comment: 10 figures, 8 tables
- Subjects :
- Condensed Matter - Materials Science
Materials science
Valence (chemistry)
Phonon
Mechanical Engineering
Materials Science (cond-mat.mtrl-sci)
FOS: Physical sciences
Bioengineering
General Chemistry
Condensed Matter::Disordered Systems and Neural Networks
Black phosphorus
Molecular dynamics
Mechanics of Materials
Model application
General Materials Science
Statistical physics
Electrical and Electronic Engineering
Valence force field
Single layer
Subjects
Details
- ISSN :
- 13616528 and 09574484
- Volume :
- 26
- Database :
- OpenAIRE
- Journal :
- Nanotechnology
- Accession number :
- edsair.doi.dedup.....e8c05ca6f08d2e170f1c1fea7162ba07