Ying Tianping, Yu Tongxu, Shiah Yu-Shien, Li Changhua, Li Jiang, Qi Yanpeng, Hosono Hideo
Materials Research Center for Element Strategy, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China.
J Am Chem Soc. 2021 May 12;143(18):7042-7049. doi: 10.1021/jacs.1c01580. Epub 2021 Apr 29.
The charge, spin, and composition degrees of freedom in a high-entropy alloy endow it with tunable valence and spin states, infinite combinations, and excellent mechanical performance. Meanwhile, the stacking, interlayer, and angle degrees of freedom in a van der Waals material bring to it exceptional features and technological applications. Integration of these two distinct material categories while keeping their merits would be tempting. On the basis of this heuristic thinking, we design and explore a new range of materials (i.e., dichalcogenides, halides, and phosphorus trisulfides) with multiple metallic constitutions and intrinsic layered structure, which are coined as high-entropy van der Waals materials. Millimeter-scale single crystals with a homogeneous element distribution can be efficiently acquired and easily exfoliated or intercalated in this materials category. Multifarious physical properties such as superconductivity, magnetic ordering, metal-insulator transition, and corrosion resistance have been exploited. Further research based on the concept of high-entropy van der Waals materials will enrich the high-throughput design of new systems with intriguing properties and practical applications.
高熵合金中的电荷、自旋和成分自由度赋予其可调的价态和自旋态、无限的组合以及优异的机械性能。同时，范德华材料中的堆积、层间和角度自由度赋予其独特的特性和技术应用。将这两种不同的材料类别整合在一起并保留它们的优点将很有吸引力。基于这种启发式思维，我们设计并探索了一系列具有多种金属组成和固有层状结构的新材料（即二硫属化物、卤化物和三硫化磷），它们被称为高熵范德华材料。在这类材料中可以高效地获得具有均匀元素分布的毫米级单晶，并且易于剥离或插入。已经开发出了诸如超导性、磁有序、金属-绝缘体转变和耐腐蚀性等多种物理性质。基于高熵范德华材料概念的进一步研究将丰富具有有趣特性和实际应用的新系统的高通量设计。
