Materials property prediction using symmetry-labeled graphs as atomic position independent descriptors

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Computational materials screening studies require fast calculation of the properties of thousands of materials. The calculations are often performed with density functional theory (DFT), but the necessary computer time sets limitations for the investigated material space. Therefore, the development of machine-learning models for prediction of DFT-calculated properties is currently of interest. A particular challenge for new materials is that the atomic positions are generally not known. We present a machine-learning model for the prediction of DFT-calculated formation energies based on Voronoi quotient graphs and local symmetry classification without the need for detailed information about atomic positions. The model is implemented as a message passing neural network and tested on the Open Quantum Materials Database (OQMD) and the Materials Project Database. The test mean absolute error is 22 meV on the OQMD and 43 meV on Materials Project Database. The possibilities for prediction in a realistic computational screening setting are investigated on a data set of 5976 ABSe3 selenides with very limited overlap with the OQMD training set. Pretraining on OQMD and subsequent training on 100 selenides result in a mean absolute error below 0.1 eV for the formation energy of the selenides.
Original languageEnglish
Article number104114
JournalPhysical Review B
Issue number10
Number of pages12
Publication statusPublished - 2019

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