Owing to the combined advantageous property and emergence of non-trivial features, vertical heterostructures based on layered two dimensional (2D) materials have been extensively explored in micro/nano electronics,1 opto-electronic devices, 1 and catalysis. 2 Due to van der Waal interaction between the layers, layered materials can be stacked in desired sequences with required properties. Tailoring the property of layered materials chalcogenides via heterostructure formation are promising for

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... th band alignment engineering and improvements of existing applications and also for the discoveries of completely new phenomena. Both VSe 2 and Bi 2 Se 3 belongs to the class of layered materials. Crystallographically, VSe 2 has Se-V-Se layers and Bi 2 Se 3 has quintuple Se-Bi-Se-Bi-Se layers and are held together by van der Waal forces. From electronic point of view, individually VSe 2 is semi-metallic in nature and Bi 2 Se 3 is a well-known topological insulator. Recently, Sinkovic et. al. have shown the emergence of flat band on formation of heterostructure based on VSe 2 -Bi 2 Se 3 .3 The flat band electronic states are predicted to achieve various quantum states of matter at high temperature such as high temperature superconductivity, 4 fractional quantum hall effect 5 and ferromagnetism. 6