The symmetry of surface states has been investigated with numerical calculations in graphene superlattices (SLs) terminated with magnetic cap layers. It is found that the surface states in SL of pure electric basis with cap layer of magnetic potential As≥ 0 are symmetric about the transverse wave vector ky= 0 plane to those with As≤ 0. While those in SL of pure magnetic basis with the same cap layer of magnetic potential As are symmetric about the energy origin E= 0 plane. Additionally, the surface states in SL of general complex electric/magnetic basis show no symmetry. These interesting results will provide some important guidelines for the experimental exploration of carbon-based quantum electronic and optoelectronic devices.
- Single layer graphene
- Superlattice of complex basis
- Surface states
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering