On the origin of the pseudogap in underdoped cuprates

Details On the origin of the pseudogap in underdoped cuprates On the origin of the pseudogap in underdoped cuprates

2002-08-21

arxiv.org/abs/cond-mat/0208419v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures, submitted to Physical Review Letters

Scientific paper

We investigate the microscopic origin of the pseudogap in the weakly doped 2D Hubbard model using Quantum Monte Carlo within the dynamical cluster approximation. We compare our results with proposed scenarios for the pseudogap. All our numerical evidence is in favor of spin-charge separation as described in the resonating valence bond picture as the cause of the pseudogap behavior. Scenarios of "preformed pairs", the coupling of quasiparticles to antiferromagnetic spin-fluctuations and stripes are inconsistent with our results.

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