Kekule-distortion-induced Exciton instability in graphene

Abstract

Effects of a Kekule distortion on exciton instability in single-layer graphene are discussed. In the framework of quantum electrodynamics the mass of the electron generated dynamically is worked out using a Schwinger-Dyson equation. For homogeneous lattice distortion it is shown that the generated mass is independent of the amplitude of the lattice distortion at the one-loop approximation. Formation of excitons induced by the homogeneous Kekule distortion could appear only through direct dependence of the lattice distortion.

6 pages, 1 figure

References in corpus (21)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Landau level degeneracy and quantum Hall effect in a graphite bilayer
• Biased bilayer graphene: semiconductor with a gap tunable by electric field effect
• Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
• Gate-induced insulating state in bilayer graphene devices
• Electronic Properties of Disordered Two-Dimensional Carbon
• Electron fractionalization in two-dimensional graphenelike structures
• Magnetic field driven metal-insulator phase transition in planar systems
• Optical and magneto-optical far-infrared properties of bilayer graphene
• Ghost excitonic insulator transition in layered graphite
• Chiral Gauge Theory for Graphene
• The Influence of the Full Vertex and Vacuum Polarization on the Fermion Propagator in QED3
• Excitonic instability in two-dimensional degenerate semimetals
• Dynamical Chiral Symmetry Breaking on a Brane in Reduced QED
• Irrational vs. rational charge and statistics in two-dimensional quantum systems
• Predicting a Gapless Spin-1 Neutral Collective Mode branch for Graphite
• Exciton formation in graphene bilayer
• Excitonic pairing between nodal fermions
• Effect of retardation on dynamical mass generation in two-dimensional QED at finite temperature
• Strict site-occupation constraint in 2d Heisenberg models and dynamical mass generation in $QE{D}_3$ at finite temperature

Cited by in corpus (7)

• Supercritical Coulomb center and excitonic instability in graphene
• Magnetic field driven instability of charged center in graphene
• Collective excitations in a large-d model for graphene
• Theory of the spontaneous buckling of doped graphene
• Dynamical fermion mass generation and exciton spectra in graphene
• Chiral symmetry restoration in monolayer graphene induced by Kekule distortion
• Spin Versus Charge Density Wave Order in Graphene-like Systems