We review the intermediate coupling model for treating electronic correlations in the cuprates. Spectral signatures of the intermediate coupling scenario are identified and used to adduce that the cuprates fall in the intermediate rather than the weak or the strong coupling limits. A robust, ‘beyond local-density approximation’ framework for obtaining wide-ranging properties of the cuprates via a GW-approximation based self-consistent self-energy correction for incorporating correlation effects is delineated. In this way, doping- and temperature-dependent spectra, from the undoped insulator to the overdoped metal, in the normal as well as the superconducting state, with features of both weak and strong coupling can be modeled in a material-specific manner with very few parameters. Efficacy of the model is shown by considering available spectroscopic data on electron- and hole-doped cuprates from angle-resolved photoemission, scanning tunneling microscopy/spectroscopy, neutron scattering, inelastic light scattering, optical and other experiments. Generalizations to treat systems with multiple correlated bands such as the heavy-fermions, the ruthenates and the actinides are discussed.

中文翻译：

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铜酸盐的中间耦合模型

我们回顾了用于处理铜酸盐电子相关性的中间耦合模型。中间耦合场景的光谱特征被识别并用于推断铜酸盐落在中间而不是弱或强耦合限制。描述了一个强大的、“超越局部密度近似”的框架，用于通过基于 GW 近似的自洽自能校正来获得铜酸盐的广泛特性，以结合相关效应。通过这种方式，掺杂和温度相关的光谱，从未掺杂的绝缘体到过掺杂的金属，处于正常状态和超导状态，具有弱耦合和强耦合的特征，可以以材料特定的方式建模几个参数。该模型的有效性通过考虑角度分辨光电发射、扫描隧道显微镜/光谱、中子散射、非弹性光散射、光学和其他实验中电子和空穴掺杂铜酸盐的可用光谱数据来显示。讨论了处理具有多个相关带的系统的概括，例如重费米子、钌酸盐和锕系元素。