Article ID Journal Published Year Pages File Type
8044610 Vacuum 2018 57 Pages PDF
Abstract
In this paper, we study the electronic properties of graphene/phosphorene (G/P) heterostructure under applied electric field. The interlayer distance between graphene and topmost phosphorene is 3.50 Å and the binding energy per carbon atom is 28.2 meV, which is indicated that graphene is bound to phosphorene via vdW interaction. The appearance of an energy gap of 33 meV in graphene is due to the dominant influence exerted by the phosphorene on graphene and sublattice symmetry broken between graphene and substrate. The G/P heterostructure forms a p-type Schottky contact with ΦBp  = 0.34 eV. By applying the negative electric field, the G/P heterostructure keeps a p-type Schottky contact. Whereas with the positive electric field of E≥ +0.25 V/Å, ΦBp becomes larger than ΦBn, resulting in a transformation from p-type to n-type Schottky contact. The present results may open up a new avenue for application of the G/P vdW heterostructure in electronic devices.
Related Topics
Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
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