标题： 一种用于铜氧化物超导体的有效单带模型 显示英文标题

标题： An effective 1-band model for the cuprate superconductors

摘要： 从铜-氧哈密顿量出发，我们通过一个规范变换消除了氧位点，解析地导出了铜位点上电子的扩展单带 Hubbard 哈密顿量。 该模型支持多种相：棋盘状状态、条纹、反铁磁性、局域对以及它们的混合物。 这种方法可能有助于理解 CuO2 平面有什么特别之处，与其他化合物相比。 显示英文摘要

摘要： Starting from the copper-oxygen Hamiltonian of the CuO2 planes, we derive analytically an extended 1-band Hubbard Hamiltonian for the electrons on copper sites, through a canonical transformation which eliminates the oxygen sites. The model sustains a variety of phases : checkerboard states, stripes, antiferromagnetism, local pairs and mixtures thereof. This approach may be helpful in understanding what is so special about the CuO2 planes, as opposed to other compounds.