Abstract:Atomic structures and electronic states of epitaxial graphene on the SiC(1120) a-face are studied based on the first-principles calculation. It is found that the surface can have two types of the surface, the stable quasi-freestanding structure and the quasi-stable buffer layer structure. The neutral nature, the low interface state density, and the absence of large interface dipoles suggest that the epitaxial graphene on the SiC(1120) a-face is appropriate for studying the physical properties of carrier transp… Show more
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