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Effects of anisotropy in QED3 from Dyson-Schwinger equations in a box

Bonnet, Jacqueline A. and Fischer, Christian S. and Richard, Williams (2011):
Effects of anisotropy in QED3 from Dyson-Schwinger equations in a box.
84, In: Physical Review B, pp. 024520, [Article]

Abstract

We investigate the effect of anisotropies in the fermion velocities of 2+1-dimensional QED on the critical number Nfc 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 a result we find sizable variations of Nfc away from the isotropic point in agreement with other approaches. We discuss the relevance of our findings for models of high-Tc superconductors.

Item Type: Article
Erschienen: 2011
Creators: Bonnet, Jacqueline A. and Fischer, Christian S. and Richard, Williams
Title: Effects of anisotropy in QED3 from Dyson-Schwinger equations in a box
Language: English
Abstract:

We investigate the effect of anisotropies in the fermion velocities of 2+1-dimensional QED on the critical number Nfc 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 a result we find sizable variations of Nfc away from the isotropic point in agreement with other approaches. We discuss the relevance of our findings for models of high-Tc superconductors.

Journal or Publication Title: Physical Review B
Volume: 84
Divisions: 05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > D: Theoretische Kernstrukturphysik > D4: Strongly Interacting Fermion Systems: Graphene
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 634: Nuclear Structure, Nuclear Astrophysics and Fundamental Experiments at Low Momentum Transfer at the Superconducting Darmstadt Accelerator (S-DALINAC) > D: Theoretische Kernstrukturphysik
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 06 May 2013 14:35
Identification Number: doi:10.1103/PhysRevB.84.024520
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