Machine learning for improved density functional theory thermodynamics
Abstract The predictive accuracy of density functional theory (DFT) for alloy formation enthalpies is often limited by intrinsic energy resolution errors, particularly in ternary phase stability calculations. In this work, we present a machine learning (ML) approach to systematically correct these e...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-02088-7 |
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| author | Sergei I. Simak Erna K. Delczeg-Czirjak Olle Eriksson |
| author_facet | Sergei I. Simak Erna K. Delczeg-Czirjak Olle Eriksson |
| author_sort | Sergei I. Simak |
| collection | DOAJ |
| description | Abstract The predictive accuracy of density functional theory (DFT) for alloy formation enthalpies is often limited by intrinsic energy resolution errors, particularly in ternary phase stability calculations. In this work, we present a machine learning (ML) approach to systematically correct these errors, improving the reliability of first-principles predictions. A neural network model has been trained to predict the discrepancy between DFT-calculated and experimentally measured enthalpies for binary and ternary alloys and compounds. The model utilizes a structured feature set comprising elemental concentrations, atomic numbers, and interaction terms to capture key chemical and structural effects. By applying supervised learning and rigorous data curation we ensure a robust and physically meaningful correction. The model is implemented as a multi-layer perceptron (MLP) regressor with three hidden layers, optimized through leave-one-out cross-validation (LOOCV) and k-fold cross-validation to prevent overfitting. We illustrate the effectiveness of this method by applying it to the Al–Ni–Pd and Al–Ni–Ti systems, which are of interest for high-temperature applications in aerospace and protective coatings. |
| format | Article |
| id | doaj-art-36067d9bcafc46b1bfaceaf2c2531374 |
| institution | DOAJ |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-36067d9bcafc46b1bfaceaf2c25313742025-08-20T03:10:17ZengNature PortfolioScientific Reports2045-23222025-05-011511910.1038/s41598-025-02088-7Machine learning for improved density functional theory thermodynamicsSergei I. Simak0Erna K. Delczeg-Czirjak1Olle Eriksson2Department of Physics, Chemistry and Biology (IFM), Linköping UniversityDepartment of Physics and Astronomy, Uppsala UniversityDepartment of Physics and Astronomy, Uppsala UniversityAbstract The predictive accuracy of density functional theory (DFT) for alloy formation enthalpies is often limited by intrinsic energy resolution errors, particularly in ternary phase stability calculations. In this work, we present a machine learning (ML) approach to systematically correct these errors, improving the reliability of first-principles predictions. A neural network model has been trained to predict the discrepancy between DFT-calculated and experimentally measured enthalpies for binary and ternary alloys and compounds. The model utilizes a structured feature set comprising elemental concentrations, atomic numbers, and interaction terms to capture key chemical and structural effects. By applying supervised learning and rigorous data curation we ensure a robust and physically meaningful correction. The model is implemented as a multi-layer perceptron (MLP) regressor with three hidden layers, optimized through leave-one-out cross-validation (LOOCV) and k-fold cross-validation to prevent overfitting. We illustrate the effectiveness of this method by applying it to the Al–Ni–Pd and Al–Ni–Ti systems, which are of interest for high-temperature applications in aerospace and protective coatings.https://doi.org/10.1038/s41598-025-02088-7 |
| spellingShingle | Sergei I. Simak Erna K. Delczeg-Czirjak Olle Eriksson Machine learning for improved density functional theory thermodynamics Scientific Reports |
| title | Machine learning for improved density functional theory thermodynamics |
| title_full | Machine learning for improved density functional theory thermodynamics |
| title_fullStr | Machine learning for improved density functional theory thermodynamics |
| title_full_unstemmed | Machine learning for improved density functional theory thermodynamics |
| title_short | Machine learning for improved density functional theory thermodynamics |
| title_sort | machine learning for improved density functional theory thermodynamics |
| url | https://doi.org/10.1038/s41598-025-02088-7 |
| work_keys_str_mv | AT sergeiisimak machinelearningforimproveddensityfunctionaltheorythermodynamics AT ernakdelczegczirjak machinelearningforimproveddensityfunctionaltheorythermodynamics AT olleeriksson machinelearningforimproveddensityfunctionaltheorythermodynamics |