Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-01-14
Int.J.Mod.Phys. B12 (1998) 1673-1692
Physics
Condensed Matter
Strongly Correlated Electrons
6 figures
Scientific paper
We calculate the self-energy of two-dimensional fermions that are coupled to transverse gauge fields, taking two-loop corrections into account. Given a bare gauge field propagator that diverges for small momentum transfers q as 1 / q^{eta}, 1 < eta < 2, the fermionic self-energy without vertex corrections vanishes for small frequencies omega as Sigma (omega) propto omega^{gamma with gamma = {frac{2}{1 + eta}} < 1. We show that inclusion of the leading radiative correction to the fermion - gauge field vertex leads to Sigma (omega) propto omega^{gamma} [ 1 - a_{eta} ln (omega_0 / omega) ], where a_{\eta} is a positive numerical constant and omega_0 is some finite energy scale. The negative logarithmic correction is consistent with the scenario that higher order vertex corrections push the exponent gamma to larger values.
No associations
LandOfFree
Vertex corrections in gauge theories for two-dimensional condensed matter systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Vertex corrections in gauge theories for two-dimensional condensed matter systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vertex corrections in gauge theories for two-dimensional condensed matter systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-210166