Virtual Node Graph Neural Network for Full Phonon Prediction

Understanding the structure–property relationship is crucial for designing materials with desired properties. The past few years have witnessed remarkable progress in machine-learning methods for this connection. However, substantial challenges remain, including the generalizability of models and prediction of properties with materials-dependent output dimensions. Here the virtual node graph neural network is presented to address the challenges.

By developing three virtual node approaches, Γ-phonon spectra and full phonon dispersion prediction from atomic coordinates were achieved. It is shown that, compared with the machine-learning interatomic potentials, this approach achieves orders-of-magnitude-higher efficiency with comparable to better accuracy. This allows the generation of databases for Γ-phonon containing over 146,000 materials and phonon band structures of zeolites.

This work provides an avenue for rapid and high-quality prediction of phonon band structures enabling materials design with desired phonon properties. The virtual node method also provides a generic method for machine-learning design with a high level of flexibility.

Designing Materials to Revolutionize and Engineer our Future (DMREF)