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Van der Waals epitaxy growth of two-dimensional materials promise controllable fabrication of novel artificial heterostructures. Here, we report molecular beam epitaxy growth of continuous molybdenum ditelluride (MoTe2) films on graphene substrates with good stoichiometry in both 2H and 1T′ phases. Post-growth annealing reveal phase transition suppressed in Te-rich atmosphere, through in-situ scanning...
As a one-atomic-layer carbon material with the symmetrical conduction and valence bands, graphene shows a lot of interesting effects under high electric field. Here, we report an observation of self-amplification effect of current in graphene transistors in high-field transport. The current in graphene transistors could increase with time and finally reaches up to the breakdown threshold of graphene,...
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