Angle resolved photoemission data in the pseudogap phase of underdoped cuprates have revealed the presence of a truncated Fermi surface consisting of Fermi arcs. We compare a number of proposed models for the arcs, and find that the one that best models the data is a d-wave energy gap with a lifetime broadening whose temperature dependence is suggestive of fluctuating pairs.
@article{arxiv.0708.1713,
title = {Modeling the Fermi arc in underdoped cuprates},
author = {M. R. Norman and A. Kanigiel and M. Randeria and U. Chatterjee and J. C. Campuzano},
journal= {arXiv preprint arXiv:0708.1713},
year = {2009}
}