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Abstract

In recent years, 2D Janus transition metal dichalcogenide (TMD) materials have attracted a lot of attention due to their unique structures, remarkable properties, and potential applications. It is a type of 2D material that cannot be obtained by exfoliation from its bulk counterparts but has to be obtained chemically from its parent TMD monolayer. Compared with the original TMD monolayer, structurally it adds an additional dipole moment and a broken mirror symmetry in the out of plane direction. This enables a variety of unprecedented properties, such as large Rashba spin splitting and enhanced piezoelectric and nonlinear optical response and induced built in electric field, etc. In this talk I will present our research efforts in synthesizing Janus TMD monolayers, characterizing their properties and collaboration with Dr. Kung-Hsuan Lin’s group in Institute of Physica in Academia Sinica.