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Role of the long-range coulomb interaction on the formation of striped phases in the two-dimensional hubbard model

机译:远程库仑相互作用对二维屋顶模型中条纹相的形成

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The formation of striped phases in the two-dimensional Hubbard model is investigated within an unrestricted slave-boson approach. We analyaze in detail the stability o f these structures as a function of doping. It turns out that the inclusion of a long-range Coulomb potential together with the strong local interaction favors the formation of half-filled vertical stripes for doping concentrations x<=1/8. Our results show that, besides the underlying lattice structure, also the electronic interactions can contribute to determine the different domain wall textures in Nd doped copper oxides and nickel oxides. An eventual spiral contribution to the striped spin textures in the copper oxide compounds is restricted to the low doping regime according to our calculations.
机译:在不受限制的奴隶 - 玻色子方法中研究了二维喧哗模型中的条纹相的形成。我们将稳定性O F详细分析这些结构作为掺杂的函数。事实证明,将远程库仑电位与强局部相互作用一起集中在形成半填充垂直条纹的形成中,用于掺杂浓度x <= 1/8。我们的结果表明,除了底层晶格结构外,电子相互作用还可以有助于确定Nd掺杂铜氧化物和氧化镍中的不同畴壁纹理。根据我们的计算,对氧化铜化合物中的条纹旋转纹理的最终螺旋贡献仅限于低掺杂方案。

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