首页> 外文会议>Conference on High Temperature Superconductivity Coral Gables, Florida January 7-13 1999 >Role of the long-range coulomb interaction on the formation of striped phases in the two-dimensional hubbard model
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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:二维库伯模型中远程库仑相互作用对条纹相形成的作用

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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:在无限制奴隶-玻色子方法中研究了二维哈伯德模型中条纹相的形成。我们详细分析了这些结构作为掺杂的函数的稳定性。事实证明,将长距离库仑电势与强局部相互作用结合在一起有助于形成掺杂浓度x <= 1/8的半填充垂直条纹。我们的结果表明,除了下面的晶格结构,电子相互作用还可以帮助确定Nd掺杂的氧化铜和氧化镍中不同的畴壁织构。根据我们的计算,最终对氧化铜化合物中的条纹状自旋织构的螺旋贡献仅限于低掺杂范围。

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