Figure 1 (IMAGE) Tohoku University Caption A comparison of Tc (crystallization temperature) and Tm (melting point) values of various 2D TM chalcogenides; The Tc and Tm values of NbTe4 were defined by the onset temperature of crystallization and melting peaks in this study. Credit Yi Shuang et al. Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.