Correlations, Plasmarons, and Quantum Spectral Function in Bilayer Graphene

Abstract

We theoretically study the many-body effects of electron electron interaction on the single particle spectral function of doped bilayer graphene. Using random phase approximation, we calculate the real and imaginary part of the self-energy and hence the spectral function. The spectral function near the Fermi surface shows the usual quasiparticle peak, establishing doped bilayer graphene, in contrast to the unstable neutral system, to be a Fermi liquid. Away from the Fermi surface, an additional broad plasmaron peak is visible in the spectral function. From the low energy behaviour of the self-energy we calculate the quasiparticle residue and the effective mass of the quasiparticles as a function of carrier density. We present results for both the on-shell and the off-shell approximation for the quasiparticle renormalization.

5 pages, 3 figures

References in corpus (10)

• The Role of Electron-electron Interactions in Graphene ARPES Spectra
• Screening, Kohn anomaly, Friedel oscillation, and RKKY interaction in bilayer graphene
• Dynamic Screening and Low Energy Collective Modes in Bilayer Graphene
• The quasiparticle spectral function in doped graphene
• Fermi Velocity Enhancement in Monolayer and Bilayer Graphene
• Electron Interactions in Bilayer Graphene: Marginal Fermi Liquid Behaviour and Zero Bias Anomaly
• Electron-electron interactions in graphene bilayers
• Electronic compressibility of a graphene bilayer
• Quasiparticle effective mass divergence in two dimensional electron systems
• Non-Fermi Liquid behavior in Neutral Bilayer Graphene

Cited by in corpus (19)

• Electronic properties of graphene-based bilayer systems
• Electron-electron interaction and electron-hole asymmetry in bilayer graphene
• Velocity renormalization and anomalous quasiparticle dispersion in extrinsic graphene
• Dynamically screened vertex correction to $GW$
• Emergence of Plasmaronic Structure in the Near Field Optical Response of Graphene
• Effective Mass in Bilayer Graphene at Low Carrier Densities: the Role of Potential Disorder and Electron-Electron Interaction
• Coulomb interaction effects in graphene bilayers: electron-hole pairing and plasmaron formation
• Temperature-dependent compressibility in graphene and two-dimensional systems
• Effect of electron-phonon coupling on energy and density of states renormalizations of dynamically screened graphene
• Plasmon-pole approximation for many-body-effects in extrinsic graphene
• Excitonic gap formation and condensation in the bilayer graphene structure
• Bilayer graphene spectral function in RPA and self-consistent GW
• Plasmons and their interaction with electrons in trilayer graphene
• Energy-Momentum dispersion relation of plasmarons in bilayer graphene
• Plasmaron excitations in p(2x2)-K/Graphite
• Distinguishing Coulomb and electron-phonon interactions for massless Dirac fermions
• Bilayer honeycomb lattice with ultracold atoms: Multiple Fermi surfaces and incommensurate spin density wave instability
• Electron-electron interactions in non-equilibrium bilayer graphene
• Many-body fermionic excitations in Weyl semimetals due to elastic gauge fields