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Title: Genetic algorithms for computational materials discovery accelerated by machine learning

Journal Article · · npj Computational Materials
 [1]; ORCiD logo [2];  [3]; ORCiD logo [2];  [1]
  1. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Technical Univ. of Denmark, Lyngby (Denmark)
  3. Toyota Research Institute, Los Altos, CA (United States)

Materials discovery is increasingly being impelled by machine learning methods that rely on pre-existing datasets. Where datasets are lacking, unbiased data generation can be achieved with genetic algorithms. Here a machine learning model is trained on-the-fly as a computationally inexpensive energy predictor before analyzing how to augment convergence in genetic algorithm-based approaches by using the model as a surrogate. This leads to a machine learning accelerated genetic algorithm combining robust qualities of the genetic algorithm with rapid machine learning. The approach is used to search for stable, compositionally variant, geometrically similar nanoparticle alloys to illustrate its capability for accelerated materials discovery, e.g., nanoalloy catalysts. The machine learning accelerated approach, in this case, yields a 50-fold reduction in the number of required energy calculations compared to a traditional “brute force” genetic algorithm. This makes searching through the space of all homotops and compositions of a binary alloy particle in a given structure feasible, using density functional theory calculations.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-76SF0051
OSTI ID:
1511649
Journal Information:
npj Computational Materials, Vol. 5, Issue 1; ISSN 2057-3960
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 103 works
Citation information provided by
Web of Science

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Cited By (4)

Identification of stable adsorption sites and diffusion paths on nanocluster surfaces: an automated scanning algorithm journal October 2019
Computational discovery of molecular C60 encapsulants with an evolutionary algorithm journal January 2020
Machine learning for interatomic potential models journal February 2020
Review: Deep Learning in Electron Microscopy text January 2020

Figures / Tables (4)