作为自发T违反轨道电流相候选的CuO平面三带模型的数值分析
Numerical analysis of three-band models for CuO planes as candidates for a spontaneous T violating orbital current phase
摘要：
最近，我们数值计算了电流-电流关联函数的基态的三带模型的CuO平面的空穴掺杂x=1/8使用系统与24个网站和周期性的边界条件。在本文中，数值分析是详细阐述和扩展到更广泛的参数范围。我们的研究结果表明，没有证据的时间反演对称性违反最近提出的Varma电流模式。如果这样的电流模式存在，我们的研究结果表明，与环电流相关的能量必须小于5毫电子伏每链接，即使现场的化学势的氧网站，这是通常假设为3.6 eV的顺序，采取零，主张由Varma。我们还改变了原子间的库仑排斥尺度，发现只有一个弱依赖于这个参数。因此，虽然我们的研究不排除这种电流模式的存在，但它们确实排除了这些模式的量子临界涨落是导致在显著更高能量下发生的现象的原因，例如超导性或在奇怪的金属相中观察到的异常性质，只要CuO超导体被讨论的任何三带模型充分描述。
英文摘要：
Recently, we have numerically evaluated the current-current correlation function for the ground states of three-band models for the CuO planes of high-Tc superconductors at hole doping x=1/8 using systems with 24 sites and periodic boundary conditions. In this article, the numerical analysis is explicated in detail and extended to a wider range of parameters. Our results show no evidence for the time-reversal symmetry violating current patterns recently proposed by Varma. If such current patterns exist, our results indicate that the energy associated with the loop currents must be smaller than 5 meV per link even if the on-site chemical potential on the oxygen sites, which is generally assumed to be of the order of 3.6 eV, is taken to zero, as advocated by Varma. We also vary the inter-atomic Coulomb repulsion scale and find only a weak dependence on this parameter. So while our studies do not rule out the existence of such current patterns, they do rule out that quantum critical fluctuations of these patterns are responsible for phenomena occurring at significantly higher energies such as the superconductivity or the anomalous properties observed in the strange metal phase provided the CuO superconductors are adequately described by any of the three-band models discussed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
