Fig. 2. (Color online) Calculated band structures and spatial distribution of (a) bare 3-QL Bi2Se3 film, (b) 3-QL Bi2Se3 film with the relaxed parameters considering the graphene, (c) 3-QL Bi2Se3/graphene film with the relaxed parameters, and (d) 3-QL Bi2Se3/graphene film with 2 % tensile strain in the in-plane direction.
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