Composition and phase engineering of metal chalcogenides and phosphorous chalcogenides

• Main Authors: Zhou, Jiadong, Zhu, Chao, Zhou, Yao, Dong, Jichen, Li, Peiling, Zhang, Zhaowei, Wang, Zhen, Lin, Yung-Chang, Shi, Jia, Zhang, Runwu, Zheng, Yanzhen, Yu, Huimei, Tang, Bijun, Liu, Fucai, Wang, Lin, Liu, Liwei, Liu, Guibin, Hu, Weida, Gao, Yanfeng, Yang, Haitao, Gao, Weibo, Lu, Li, Wang, Yeliang, Suenaga, Kazu, Liu, Guangtong, Ding, Feng, Yao, Yugui, Liu, Zheng
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Materials::Nanostructured materials; 2D Materials; Metal Chalcogenides
• Online Access: https://hdl.handle.net/10356/161708
• Institution: Nanyang Technological University

Two-dimensional (2D) materials with multiphase, multielement crystals such as transition metal chalcogenides (TMCs) (based on V, Cr, Mn, Fe, Cd, Pt and Pd) and transition metal phosphorous chalcogenides (TMPCs) offer a unique platform to explore novel physical phenomena. However, the synthesis of a single-phase/single-composition crystal of these 2D materials via chemical vapour deposition is still challenging. Here we unravel a competitive-chemical-reaction-based growth mechanism to manipulate the nucleation and growth rate. Based on the growth mechanism, 67 types of TMCs and TMPCs with a defined phase, controllable structure and tunable component can be realized. The ferromagnetism and superconductivity in FeXy can be tuned by the y value, such as superconductivity observed in FeX and ferromagnetism in FeS2 monolayers, demonstrating the high quality of as-grown 2D materials. This work paves the way for the multidisciplinary exploration of 2D TMPCs and TMCs with unique properties.