Extend the omnidirectional electronic gap of Thue-Morse aperiodic gapped graphene superlattices

摘要

An effective way used to extend omnidirectional electronic gap (OEG) by using Thue-Morse gapped graphene superlattice (GSL) heterostructure is proposed. The heterostructure consists of different Thue-Morse gapped graphene superlattices with different width ratios of potentials. The optimal potential width ratios of constituent Thue-Morse gapped graphene superlattices are easy to be established owing to the lower and upper energy edges of omnidirectional electronic gap depend on the width ratio of potentials. Furthermore, the omnidirectional electronic gap is independence of structure order, thus we can use different optimal Thue-Morse gapped graphene superlattices of any structure order to form a heterostructure to extend this gap as desired.