论文标题
铜酸盐三波段模型中的超导性：淋巴结方向特征和场所相互作用的影响
Superconductivity in the three-band model of cuprates: nodal direction characteristics and influence of intersite interactions
论文作者
论文摘要
使用三波段的Emery模型来研究基于铜的化合物中$ d $ - $ wave $超导阶段所选的主要特征。通过使用Guztwiller波函数（DE-GWF）方法的图形扩展来考虑电子电子相关性。节点费米的速度，费米动量和有效质量均在配对状态下确定，并与可用的实验数据以及相应的单频计算显示相对良好的一致性。此外，分析了下一个最新的邻居氧气跳跃和库仑间排斥项对超导阶段的影响。
The three-band Emery model is applied to study the selected principal features of the $d$-$wave$ superconducting phase in the copper-based compounds. The electron-electron correlations are taken into account by the use of the diagrammatic expansion of the Guztwiller wave function (DE-GWF) method. The nodal Fermi velocity, Fermi momentum and effective mass are all determined in the paired state and show relatively good agreement with the available experimental data, as well as with the corresponding single-band calculations. Additionally, the influence of the next-nearest neighbor oxygen-oxygen hopping and intersite Coulomb repulsion terms on the superconducting phase is analyzed.
