Spectroscopic Signatures of Massless Gap Opening in Graphene

Abstract

Gap opening in graphene is usually discussed in terms of a semiconducting-like spectrum, where the appearance of a finite gap at the Dirac point is accompanied by a finite mass for the fermions. In this Letter we propose a gap scenario from graphene which preserves the massless characters of the carriers. This approach explains recent spectroscopic measurements carried out in epitaxially-grown graphene, ranging from photoemission to optical transmission.

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• Interband optical conductivity of the [001]-oriented Dirac semimetal Cd3As2
• Electron-Phonon Coupling in Highly-Screened Graphene
• Vertex renormalization in dc conductivity of doped chiral graphene
• Thermoelectric transport properties in graphene connected molecular junctions
• Helical metals and insulators and sheet singularity of inflated Berry monopole
• Massless Dirac cones in graphene: experiments and theory
• NMR parameters in gapped graphene systems
• Vibrational stability of graphene under combined shear and axial strains
• Weakly (and not so weakly) bound states of a relativistic particle in one dimension
• Fate of surface gaps in magnetic topological insulators