Curvature-induced p-n junctions in bent or folded bilayer graphene sheets

Article

关键词: CARBON NANOTUBES;    QUANTUM-MECHANICS;    BOUND-STATES;    WAVE-GUIDES;    NANORIBBONS;   

DOI  :  10.1103/PhysRevB.80.153405

来源: SCIE

【 摘 要 】

A massive quantum particle on a two-dimensional curved surface experiences a surface-geometry induced attractive potential that is characterized by the radii of curvature at a given point. With bilayer graphene sheets and carbon nanoribbons in mind, we obtain the geometric potential V-G for several surface shapes. Under appropriate conditions that we discuss in detail, this potential suppresses the local Fermi energy. Therefore, we argue that in zero band-gap materials with a quadratic band structure, it will create p- and n-type regions. We discuss the consequences of this result, and suggest that surface curvature can provide an avenue to create p-n junctions and, in general, to control local electronic properties in carbon nanoribbons and bilayer graphene sheets.

【 授权许可】

Free