Abstract
The success in graphene with fascinating and technologically useful properties[1] has stimulated the study of two-dimensional (2D) atomic-layer materials other than graphene, such as single layers of transition metal dichalcogenides (TMDCs, e.g., MoS2, WS2, WSe2, etc)[2] and a few quintuple layers of topological insulators (TIs, e.g., Bi2Se3, Bi2Te3, Sb2Te3 etc)[3] . The rapid pace of progress in graphene, TMDCs and TIs and some demonstrated applications have led to the exploration of new type of electric and optoelectronic devices constructed by vertically stacking different layered materials. [4-9]
© 2015 Japan Society of Applied Physics, Optical Society of America
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