Gauge invariant response functions in Algebraic Fermi liquids
Strongly Correlated Electrons
2011-06-13 v2 Superconductivity
Abstract
A new method is developed that permits the simple evaluation of two-loop response functions for fermions coupled to a gauge field. We employ this method to study the gauge-invariant response functions in the Algebraic Fermi liquid, a non-Fermi liquid state proposed to describe the pseudogap phase in the QED3 theory of cuprate superconductors. The staggered spin susceptibility is found to exhibit a characteristic anomalous dimension exponent \eta_4, while other correlators show behavior consistent with the conservation laws imposed by the symmetries of the underlying theory.
Keywords
Cite
@article{arxiv.cond-mat/0211119,
title = {Gauge invariant response functions in Algebraic Fermi liquids},
author = {M. Franz and T. Pereg-Barnea and D. E. Sheehy and Z. Tesanovic},
journal= {arXiv preprint arXiv:cond-mat/0211119},
year = {2011}
}
Comments
4 pages REVTeX + 1 PostScript figure. Version published in PRB. For related work and info visit http://www.physics.ubc.ca/~franz/