Tunable skewed edges in puckered structures | |
Article | |
关键词: BLACK PHOSPHORUS; NANORIBBONS; STATE; SEMICONDUCTOR; MOBILITY; BAND; | |
DOI : 10.1103/PhysRevB.93.245413 | |
来源: SCIE |
【 摘 要 】
We propose a type of edges arising due to the anisotropy inherent in the puckered structure of a honeycomb system such as in phosphorene. Skewed-zigzag and skewed-armchair nanoribbons are semiconducting and metallic, respectively, in contrast to their normal edge counterparts. Their band structures are tunable, and a metal-insulator transition is induced by an electric field. We predict a field-effect transistor based on the edge states in skewed-armchair nanoribbons, where the edge state is gapped by applying arbitrary small electric field E-z. A topological argument is presented, revealing the condition for the emergence of such edge states.
【 授权许可】
Free