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• W2895581627 abstract "A quantitative descriptor of local atomic environments is often required for the analysis of atomistic data. Descriptors of the local atomic environment ideally provide physically and chemically intuitive insight. This requires descriptors that are low-dimensional representations of the interplay between atomic geometry and electronic bond formation. The moments of the local density of states (DOS) relate the atomic structure to the electronic structure and bond chemistry. This makes it possible to construct electronic structure based descriptors of the local atomic environment that have an immediate relation to the binding energy. We show that a low-dimensional moments-descriptor is sufficient as the lowest moments, calculated from the closest atomic neighborhood, carry the largest contributions to the local bond energy. Here, we construct moments-descriptors that project the space of local atomic environments on a 2-D map. We discuss in detail the separation of various atomic environments and their connections in the map. The distances in the map may be related to energy differences between local atomic environments as we show by analytic considerations based on analytic bond-order potentials (BOP) and by numerical assessment using TB and density-functional theory calculations. Possible applications of the proposed moments-descriptors include the classification of local atomic environments in molecular-dynamic simulations, the selection of structure sets for developing and testing interatomic potentials, as well as the construction of descriptors for machine-learning applications." @default.
• W2895581627 created "2018-10-12" @default.
• W2895581627 creator A5022871779 @default.
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• W2895581627 date "2018-10-03" @default.
• W2895581627 modified "2023-09-25" @default.
• W2895581627 title "Electronic structure based descriptor for characterizing local atomic environments" @default.
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• W2895581627 doi "https://doi.org/10.1103/physrevb.98.144102" @default.
• W2895581627 hasPublicationYear "2018" @default.
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