Pseudogap and Antiferromagnetic Correlations in the Hubbard Model

Alexandru Macridin, M. Jarrell, Thomas Maier, P. R. C. Kent, and Eduardo D’Azevedo
Phys. Rev. Lett. 97, 036401 – Published 19 July 2006

Abstract

Using the dynamical cluster approximation and quantum Monte Carlo simulations we calculate the single-particle spectra of the Hubbard model with next-nearest neighbor hopping t. In the underdoped region, we find that the pseudogap along the zone diagonal in the electron doped systems is due to long-range antiferromagnetic correlations. The physics in the proximity of (0, π) is dramatically influenced by t and determined by the short range correlations. The effect of t on the low-energy angle-resolved photoemission spectroscopy spectra is weak except close to the zone edge. The short range correlations are sufficient to yield a pseudogap signal in the magnetic susceptibility and produce a concomitant gap in the single-particle spectra near (π, π/2), but not necessarily at a location in the proximity of the Fermi surface.

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  • Received 6 September 2005

DOI:https://doi.org/10.1103/PhysRevLett.97.036401

©2006 American Physical Society

Authors & Affiliations

Alexandru Macridin1, M. Jarrell1, Thomas Maier2, P. R. C. Kent1,2, and Eduardo D’Azevedo2

  • 1University of Cincinnati, Cincinnati, Ohio, 45221, USA
  • 2Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, USA

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Issue

Vol. 97, Iss. 3 — 21 July 2006

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