Magnetic Domains and Stripes in the Spin-Fermion Model for Cuprates

Details Magnetic Domains and Stripes in the Spin-Fermion Model for Cuprates Magnetic Domains and Stripes in the Spin-Fermion Model for Cuprates

1999-08-26

arxiv.org/abs/cond-mat/9908389v1

Physics

Condensed Matter

Strongly Correlated Electrons

Four pages with four figures embedded in text

Scientific paper

10.1103/PhysRevLett.84.2690

Monte Carlo simulations applied to the Spin-Fermion model for cuprates show the existence of antiferromagnetic spin domains and charge stripes upon doping. The stripes are partially filled, with a filling of approximately 1/2 hole per site, and they separate spin domains with a $\pi$ phase shift among them. The stripes observed run either along the x or y axes and they are separated by a large energy barrier. No special boundary conditions or external fields are needed to stabilize these structures at low temperatures. When magnetic incommensurate peaks are observed at momentum $\pi(1,1-\delta)$ and symmetrical points, charge incommensurate peaks appear at $(0,2 \delta)$ and symmetrical points, as experimentally observed. The strong charge fluctuations responsible for the formation of the stripes also induce a pseudogap in the density of states.

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