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

Charles Buhler·Seiji Yunoki·Adriana Moreo
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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 $π$ 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 $π(1,1-δ)$ and symmetrical points, charge incommensurate peaks appear at $(0,2 δ)$ 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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Charles Buhler, Seiji Yunoki, Adriana Moreo. 1999-08-26. Magnetic Domains and Stripes in the Spin-Fermion Model for Cuprates. https://doi.org/10.1103/physrevlett.84.2690

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