Effects of Anisotropy in QED3 from Dyson-Schwinger equations in a box
arXiv:1103.1578 · doi:10.1103/PhysRevB.84.024520
Abstract
We investigate the effect of anisotropies in the fermion velocities of 2+1 dimensional QED on the critical number N_f^c of fermions for dynamical mass generation. Our framework are the Dyson-Schwinger equations for the gauge boson and fermion propagators formulated in a finite volume. In contrast to previous Dyson-Schwinger studies we do not rely on an expansion in small anisotropies but keep the full velocity dependence of fermion equations intact. As result we find sizable variations of N_f^c away from the isotropic point in agreement with other approaches. We discuss the relevance of our findings for models of high-T_c superconductors.
9 pages, 7 figures, v2: minor changes, typos corrected, version accepted by PRB
References in corpus (10)
- AC conductivity of graphene: from tight-binding model to 2+1-dimensional quantum electrodynamics
- Regarding confinement and dynamical chiral symmetry breaking in QED3
- Building the Full Fermion-Photon Vertex of QED by Imposing Multiplicative Renormalizability of the Schwinger-Dyson Equations for the Fermion and Photon Propagators
- Gauge invariance of a critical number of flavours in QED3
- Large volume behaviour of Yang-Mills propagators
- Chiral Symmetry Restoration in Anisotropic QED(3)
- Finite volume effects and dynamical chiral symmetry breaking in QED3
- Chiral Symmetry breaking in Three Dimensional QED
- Lattice Study of Anisotropic QED-3
- Aspects of quark mass generation on a torus