Dirac Fermion in Strongly-Bound Graphene Systems

Abstract

It is highly desirable to integrate graphene into existing semiconductor technology, where the combined system is thermodynamically stable yet maintain a Dirac cone at the Fermi level. Firstprinciples calculations reveal that a certain transition metal (TM) intercalated graphene/SiC(0001), such as the strongly-bound graphene/intercalated-Mn/SiC, could be such a system. Different from free-standing graphene, the hybridization between graphene and Mn/SiC leads to the formation of a dispersive Dirac cone of primarily TM d characters. The corresponding Dirac spectrum is still isotropic, and the transport behavior is nearly identical to that of free-standing graphene for a bias as large as 0.6 V, except that the Fermi velocity is half that of graphene. A simple model Hamiltonian is developed to qualitatively account for the physics of the transfer of the Dirac cone from a dispersive system (e.g., graphene) to an originally non-dispersive system (e.g., TM).

Apr 25th, 2012 submitted

References in corpus (13)

• The electronic properties of graphene
• Graphene: Status and Prospects
• Doping graphene with metal contacts
• Properties of Graphene: A Theoretical Perspective
• Quasi-free Standing Epitaxial Graphene on SiC by Hydrogen Intercalation
• Electronic structure of epitaxial graphene layers on SiC: effect of the substrate
• Ab initio Study of Graphene on SiC
• Role of Symmetry in the Transport Properties of Graphene Nanoribbons under Bias
• Origins of anomalous electronic structures of epitaxial graphene on silicon carbide
• Anisotropic Dirac fermions in a Bi square net of SrMnBi2
• Quantum Manifestations of Graphene Edge Stress and Edge Instability: A First-Principles Study
• Electronic decoupling of an epitaxial graphene monolayer by gold intercalation
• Graphene-based electronic spin lenses

Cited by in corpus (12)

• Thermal and Thermoelectric Properties of Graphene
• Functionalized Germanene as a Prototype of Large-Gap Two-Dimensional Topological Insulators
• A Gapless MoS${}_2$ Allotrope Possessing Both Massless Dirac and Heavy Fermions
• Theory of the Dirac Half Metal and Quantum Anomalous Hall Effect in Mn Intercalated Epitaxial Graphene
• Dirac Fermions in Blue-Phosphorus
• Double Kagome bands in a two-dimensional phosphorus carbide P2C3
• Alloy engineering of topological semimetal phase transition in MgTa${}_{2-x}$Nb${}_x$N${}_3$
• Thermoelectric Effects and Topological Insulators
• Large Rashba Spin-Orbit Coupling and High-Temperature Quantum Anomalous Hall Effect in Re-Intercalated Graphene/CrI${}_3$ Heterostructure
• Realization of Kane-Mele Model in $X{\mathbf{N}}_4$-Embedded Graphene ($X$=Pt, Ir, Rh, Os)
• Gate-independent energy gap in non-covalently intercalated bilayer graphene on SiC(0001)
• Unconventional quantized edge transport in the presence of inter-edge coupling in intercalated graphene