Chirality and Correlations in Graphene

Abstract

Graphene is described at low-energy by a massless Dirac equation whose eigenstates have definite chirality. We show that the tendency of Coulomb interactions in lightly doped graphene to favor states with larger net chirality leads to suppressed spin and charge susceptibilities. Our conclusions are based on an evaluation of graphene's exchange and random-phase-approximation (RPA) correlation energies. The suppression is a consequence of the quasiparticle chirality switch which enhances quasiparticle velocities near the Dirac point.

5 pages, 4 figures

References in corpus (4)

• Electric Field Effect in Atomically Thin Carbon Films
• Unconventional Integer Quantum Hall effect in graphene
• Anomalous thermodynamics of Coulomb interacting massless Dirac fermions in two spatial dimensions
• Pauli spin susceptibility of a strongly correlated two-dimensional electron liquid

Cited by in corpus (14)

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• The Role of Electron-electron Interactions in Graphene ARPES Spectra
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• Boltzmann transport and residual conductivity in bilayer graphene
• Density-Functional Theory of Graphene Sheets
• The quasiparticle spectral function in doped graphene
• Charge response function and a novel plasmon mode in graphene
• Density dependent exchange contribution to $\partial \mu /\partial n$ in extrinsic graphene
• Electron-Electron Interactions in the Vacuum Polarization of Graphene
• Effect of electron-electron interaction on the Fermi surface topology of doped graphene
• Exchange induced charge inhomogeneities in rippled neutral graphene
• Electronic compressibility of a graphene bilayer
• Tomonaga-Luttinger liquid parameters of magnetic waveguides in graphene