二维VB族过渡金属二硫属化合物的制备及物性研究

Fabrication Methods and Properties of Two-Dimensional Group VB Transition Metal Dichalcogenides

二维材料因为其简单的结构和特殊的物理化学性质近些年来受到科研人员的广泛关注。作为与石墨烯同属于二维材料家族的过渡金属族二硫属化合物(TMDs),在降低维度后,具有不同的半导体或金属特性,并由于维度的特性,将出现电荷密度波、磁性等独特物性。其中, VB族过渡金属二硫属化合物因为其相结构的多样性和物理性质的独特性而逐渐进入人们的视野。本文主要总结了近几年对于二维VB族过渡金属二硫属化合物的研究成果,从制备手段和物理性能进行介绍。制备方法主要包括机械剥离法、分子束外延法(MBE)、化学气相沉积法(CVD)等,并利用扫描隧道显微镜、拉曼光谱、电学器件等方式对物理性能进行表征。物理性能包括电荷密度波、超导电性、磁性。最后结合这些理论和相关性质的应用,对未来的研究方向和应用前景做出总结和展望。

Two-dimensional materials have received rising attention in recent years, because of their simple structure and special physical and chemical properties. Transition metal dichalcogenides(TMDs), which belongs to the family of two-dimensional(2 D) materials, has semiconductor or metal properties at the limit of atomic thickness. Some unique properties, such assuperconductivity, charge density wave and magnetism, will appear or change with the reduction of thickness. Among TMDs, the group VB transition metal dichalcogenides gradually enter scientists’ vision due to their versatile phases and physical properties. This paper summarized the research results of two-dimensional group VB transition metal dichalcogenides in recent years, mainly focusing on the fabrication methods and physical properties(such as charge density wave, superconductivity, magnetic, etc.). The fabrication method mainly adopted mechanical exfoliation, molecular beam epitaxy(MBE), chemical vapor deposition(CVD), etc. Physical properties were characterized by scanning tunneling microscope, Raman spectroscopy and electrical device. Finally, it could give some guidance to the future research direction and application prospects.