Tree model machine learning to identify liquid metal-based alloy superconductor

Superconductors, which are crucial for modern advanced technologies due to their zero-resistance properties, are limited by low critical temperature (Tc) and the difficulty of accurate prediction. This article makes the initial endeavor to apply machine learning to predict the Tc of liquid metal (LM) alloy superconductors. Leveraging the SuperCon dataset, which includes extensive superconductor property data, we developed a machine learning model to predict Tc under ambient pressure. After addressing data issues through preprocessing, we compared multiple models and found that the ExtraTrees model outperformed others with a coefficient of determination (R2) of 0.9519 and a root mean square error (RMSE) of 6.2624 K. This model is subsequently used to predict Tc for LM alloys, revealing In0.5Sn0.5 as having the highest Tc at 7.01 K. Furthermore, we extended the prediction to 2145 alloys binary and 45670 ternary alloys across 66 metal elements and promising results were achieved. This work demonstrates the advantages of tree-based models in predicting Tc and would help accelerate the discovery of high-performance LM alloy superconductors in the coming time.