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

Abstract

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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References in corpus (2)

• Pseudogap Formation in Models for Manganites
• Indications of Spin-Charge Separation in the 2D Extended t-J Model

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