Publication: Robust Nodal d-Wave Spectrum in Simulations of a Strongly Fluctuating Competing Order in Underdoped Cuprate Superconductors

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Title	Robust Nodal d-Wave Spectrum in Simulations of a Strongly Fluctuating Competing Order in Underdoped Cuprate Superconductors
Authors/Editors*	W. A. Atkinson, J. D. Bazak, B. M. Andersen
Where published*	Physical Review Letters
How published*	Journal
Year*	2012
Volume	109
Number
Pages	267004
Publisher
Keywords
Link	http://prl.aps.org/abstract/PRL/v109/i26/e267004
Abstract	We resolve an existing discrepancy between convincing evidence for competing order in underdoped cuprates and spectroscopic data consistent with a homogeneous d-wave superconductor in the very same compounds. Specifically, we show that fluctuations of the competing order generate strongly inhomogeneous states whose spectra are almost indistinguishable from the pure d-wave superconductor. This is in contrast to the commonly studied case of homogeneously coexisting order, which typically generates a reconstructed Fermi surface with closed Fermi pockets. The signatures of the fluctuating competing order can be found mainly in a splitting of the antinodal band, and, for strong magnetic order, in small induced nodal gaps similar to those found in recent experiments on underdoped La2-xSrxCuO4.