Statistical learning of materials properties or functions so far starts with a largely silent, nonchallenged step: the choice of the set of descriptive parameters (termed descriptor). However, when the scientific connection between the descriptor and the actuating mechanisms is unclear, the causality of the learned descriptor-property relation is uncertain. Thus, a trustful prediction of new promising materials, identification of anomalies, and scientific advancement are doubtful. We analyze this issue and define requirements for a suitable descriptor. For a classic example, the energy difference of zinc blende or wurtzite and rocksalt semiconductors, we demonstrate how a meaningful descriptor can be found systematically.
Big data of materials science: critical role of the descriptor.
L. Ghiringhelli,J. Vybíral,S. Levchenko,C. Draxl,M. Scheffler
Published 2014 in Physical Review Letters
ABSTRACT
PUBLICATION RECORD
- Publication year
2014
- Venue
Physical Review Letters
- Publication date
2014-11-27
- Fields of study
Medicine, Materials Science, Physics
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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