Fermion Velocity Renormalization on Dynamical Mass Generation in QED$_3$

Details Fermion Velocity Renormalization on Dynamical Mass Generation in QED$_3$ Fermion Velocity Renormalization on Dynamical Mass Generation in QED$_3$

2012-03-19

arxiv.org/abs/1203.4068v1

Chinese Physics Letter, Vol 29, page 057401(2012)

Physics

Condensed Matter

Superconductivity

6 pages, 3 figures, accepted by Chinese Physics Letter, to appear as Chinese Physics Letter, Vol 29, page 057401(2012)

Scientific paper

We study dynamical fermion mass generation in (2+1)-dimensional quantum electrodynamics with a gauge field coupling to massless Dirac fermions and non-relativistic scalar bosons. We calculate the fermion velocity renormalization and then examine its influence on dynamical mass generation by using the Dyson-Schwinger equation. It is found that dynamical mass generation takes place even after including the scalar bosons as long as the bosonic compressibility parameter $\xi$ is sufficiently small. In addition, the fermion velocity renormalization enhances the dynamically generated mass.

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