An Investigation in Phase Transition of MoTe2 Film with Continuous Tellurization Reaction

Abstract

Molybdenum ditelluride (MoTe2), as a member of two dimentional transition metal dichalcogenides (2D TMDCs), has been drawing scientists' attention due to its susceptible phase transition. Here, we studied the phase transition process of MoTe2 with tellurization reaction step by step. In the process of tellurization reaction, the 1T' MoTe2 would firstly convert to an intermediate phase (1T'@ 2H MoTe2) and then slowly convert to 2H MoTe2 instead of forming a direct phase transition from 1T' MoTe2 to 2H MoTe2. This result might inspire the phase engineering of other 2D TMDCs and the exploration of potential device design.