Static structure factor for graphene in a magnetic field

Abstract

A close study is made of the static structure factor for graphene in a magnetic field at integer filling factors nu, with focus on revealing possible signatures of "relativistic" quantum field theory in the low-energy physics of graphene. It is pointed out, in particular, that for graphene even the vacuum state has a nonzero density spectral weight, which, together with the structure factor for all nu, grows significantly with increasing wave vector; such unusual features of density correlations are a "relativistic" effect deriving from massless Dirac quasiparticles in graphene. Remarkably it turns out that the zero-energy Landau levels of electrons or holes, characteristic to graphene, remain indistinguishable in density response from the vacuum state, although they are distinct in Hall conductance.

7 pages, 3 figures, revtex

References in corpus (8)

• Chiral tunneling and the Klein paradox in graphene
• Dielectric function, screening, and plasmons in 2D graphene
• Unconventional Integer Quantum Hall effect in graphene
• Dynamical polarization of graphene at finite doping
• Quantum Hall Ferromagnetism in Graphene
• Landau Level Splitting in Graphene in High Magnetic Fields
• Graphene integer quantum Hall effect in the ferromagnetic and paramagnetic regimes
• Electromagnetic response and effective gauge theory of graphene in a magnetic field

Cited by in corpus (2)

• Pseudo-zero-mode Landau levels and collective excitations in bilayer graphene
• Electromagnetic response and pseudo-zero-mode Landau levels of bilayer graphene in a magnetic field