Two-dimensional carbon allotrope with strong electronic anisotropy

Article

关键词: MASSLESS DIRAC FERMIONS;    GRAPHENE FILMS;    LARGE-AREA;    PLANAR;    NETWORKS;    GRAPHYNE;   

DOI  :  10.1103/PhysRevB.87.075453

来源: SCIE

【 摘 要 】

Two two-dimensional carbon allotropes comprised of octagons and pentagons are proposed based on the first-principles calculations. The two carbon allotropes, named OPG-L and OPG-Z, are found to have distinct properties. OPG-L is metallic, while OPG-Z is a gapless semimetal. Remarkably, OPG-Z exhibits pronounced electronic anisotropy with highly anisotropic Dirac points at the Fermi level. A tight-binding model is suggested to describe the low-energy quasiparticles, which clarifies the origin of the anisotropic Dirac points. The electronic anisotropy of OPG-Z is expected to have interesting potential applications in electronic devices. DOI: 10.1103/PhysRevB.87.075453

【 授权许可】

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