Machine Learning to Instruct Single Crystal Growth by Flux Method**Supported by the National Key Research and Development Program of China under Grant Nos 2016YFA0401000 and 2017YFA0302901, the National Basic Research Program of China under Grant No 2015CB921000, the National Natural Science Foundation of China under Grant Nos 11574371, 11774399 and 11774398, the Beijing Natural Science Foundation (Z180008), and the Strategic

Abstract

Growth of high-quality single crystals is of great significance for research of condensed matter physics. The exploration of suitable growing conditions for single crystals is expensive and time-consuming, especially for ternary compounds because of the lack of ternary phase diagram. Here we use machine learning (ML) trained on our experimental data to predict and instruct the growth. Four kinds of ML methods, including support vector machine (SVM), decision tree, random forest and gradient boosting decision tree, are adopted. The SVM method is relatively stable and works well, with an accuracy of 81% in predicting experimental results. By comparison, the accuracy of laboratory reaches 36%. The decision tree model is also used to reveal which features will take critical roles in growing processes.