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Description

JARVIS

Fast screening and mapping energy landscape with chemo-structural descriptors

Overview

Technological advancement requires discovery of new materials, the possible materials can span up to 10100. Conventional methods such as high-throughput (HT) experiment and HT-computational methods such as DFT and FF are too expensive. One of the possible approaches to deal with this problem is using artificial-intelligence (AI) tools such as machine-learning. Key challenges in employing AI techniques to materials are:

  • having a  high-fidelity large (>104) database
  • choosing effective descriptors for materials
  • choosing appropriate algorithm/work-flow during AI design

Relation to AI

In this program, we are

  • developing a high-fidelity DFT database (JARVIS-DFT)
  • developing chemo-structural descriptors (total 1557 right now for one material)
  • applying highly-explainable and acclaimed algorithm: gradient boosting decision trees (GBDT)

Both our database and machine learning models are publicly available at

Why NIST

  • Computational expertise and NIST facility
  • Continuous collaboration with DFT and machine learning experts in NIST’s Material Measurement Lab and Statistical Engineering divisions
  • Experimental validation with NIST collaborators

Major Accomplishments

  • >30000 materials (>105 calculated properties) in JARVIS-DFT
  • Developed completely new set of structural descriptors
  • Obtained highly-accurate machine learning models for formation energy, band gap, refractive index, exfoliation energy, and magnetic moment
  • Integration of genetic algorithm with machine learning to map energy landscape
  • New website for predicting properties with machine learning on the fly: https://www.ctcms.nist.gov/jarvisml/

Ongoing Challenges

  • Computing more data, especially 2D materials
  • Visualization of large datasetsBetter descriptors for magnetic properties
  • Machine learning on topological materials properties

Created March 26, 2019, Updated April 3, 2019