2005/09/30 by Alexandru Macridin, Mark Jarrell, Thomas Maier +2 · 1 citation
Physics and Astronomy · #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.97.036401
published as Phys. Rev. Lett. 97, 036401 (2006) · 5 pages, 4 figures
arxiv created 2006/03/08 · arxiv updated 2009/12/01
Using the dynamical cluster approximation and quantum monte carlo 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 ARPES spectra is weak except close to the zone edge. The short range correlations are sufficient to yield a pseudogap signal in the magnetic susceptibility, produce a concomitant gap in the single-particle spectra near (π,π/2) but not necessarily at a location in the proximity of Fermi surface.