Datum
2023-08-15Metadata
Zur Langanzeige
Aufsatz
Neural network interatomic potential for laser-excited materials
Zusammenfassung
Data-driven interatomic potentials based on machine-learning approaches have been increasingly used to perform large-scale, first-principles quality simulations of materials in the electronic ground state. However, they are not able to describe situations in which the electrons are excited, like in the case of material processing by means of femtosecond laser irradiation or ion bombardment. In this work, we propose a neural network interatomic potential with an explicit dependency on the electronic temperature. Taking silicon as an example, we demonstrate its capability of reproducing important physical properties with first-principles accuracy and use it to simulate laser-induced surface modifications on a thin film at time and length scales that are impossible to reach with first-principles approaches like density functional theory. The method is general and can be applied not only to other laser-excited materials but also to condensed and liquid matter under non-equilibrium situations in which electrons and ions exhibit different temperatures.
Zitierform
In: Communications Materials Volume 4 (2023-08-15) eissn:2662-4443Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202312189239,
author={Plettenberg, Pascal and Bauerhenne, Bernd and Garcia, Martin Ezequiel},
title={Neural network interatomic potential for laser-excited materials},
journal={Communications Materials},
year={2023}
}
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2023-12-18T11:41:26Z 2023-12-18T11:41:26Z 2023-08-15 doi:10.17170/kobra-202312189239 http://hdl.handle.net/123456789/15308 Gefördert im Rahmen des Projekts DEAL eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ Neuronale Netze Datengesteuerte interatomare Potentiale Laser-erregte Materialien 620 Neural network interatomic potential for laser-excited materials Aufsatz Data-driven interatomic potentials based on machine-learning approaches have been increasingly used to perform large-scale, first-principles quality simulations of materials in the electronic ground state. However, they are not able to describe situations in which the electrons are excited, like in the case of material processing by means of femtosecond laser irradiation or ion bombardment. In this work, we propose a neural network interatomic potential with an explicit dependency on the electronic temperature. Taking silicon as an example, we demonstrate its capability of reproducing important physical properties with first-principles accuracy and use it to simulate laser-induced surface modifications on a thin film at time and length scales that are impossible to reach with first-principles approaches like density functional theory. The method is general and can be applied not only to other laser-excited materials but also to condensed and liquid matter under non-equilibrium situations in which electrons and ions exhibit different temperatures. open access Plettenberg, Pascal Bauerhenne, Bernd Garcia, Martin Ezequiel doi:10.1038/s43246-023-00389-w Neuronales Netz Maschinelles Lernen Laser Erregung Material publishedVersion eissn:2662-4443 Communications Materials Volume 4 false 63
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