2004/11/30 by Kamran Kaveh, Igor F. Herbut · 4 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.71.184519
published as Phys.Rev. B71 (2005) 184519 · 7 pages, 7 figures
arxiv created 2005/04/12 · openalex publication_date 2005/05/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Motivated by recent theoretical approaches to high temperature superconductivity, we study dynamical mass generation in three-dimensional quantum electrodynamics (QED3) in the presence of irrelevant four-fermion quartic terms. The problem is reformulated in terms of the renormalization group flows of certain four-fermion couplings and charge, and then studied in the limit of a large number of fermion flavors N. We find that the critical number of fermions Nc below which the mass becomes dynamically generated depends continuously on a weak chiral symmetry breaking interaction. One-loop calculation in our gauge-invariant approach yields Nc0=6 in pure QED3. We also find that chiral symmetry preserving mass cannot become dynamically generated in pure QED3.