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首页> 外文期刊>Physical review >Curvature-induced p-n junctions in bent or folded bilayer graphene sheets
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Curvature-induced p-n junctions in bent or folded bilayer graphene sheets

机译:弯曲或折叠的双层石墨烯片中的曲率诱导的p-n结

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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.
机译:二维曲面上的块状量子粒子会经历表面几何形状诱导的吸引力,该吸引力的特征在于给定点处的曲率半径。考虑到双层石墨烯片和碳纳米带,我们获得了几种表面形状的几何势V_G。在我们详细讨论的适当条件下,此势能抑制局部费米能量。因此,我们认为在具有二次带结构的零带隙材料中,它将创建p型和n型区域。我们讨论了此结果的后果,并建议表面曲率可以提供创建p-n结的途径,并且通常可以控制碳纳米带和双层石墨烯片中的局部电子性能。

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