发表机构
North Carolina State University; Max Planck Institute for Solid State Research（北卡罗来纳州立大学; 马克斯·普朗克固体研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究从化学视角出发，通过分析空穴掺杂CuO₄聚集体的分离压力指数，提出铜基超导体的d波库珀对是受反铁磁空穴二聚体保护的自旋二聚体，该结论可解释相关困惑观测现象。
AI 中文摘要
铜基超导体的相干长度极短这一观测结果，促使我们通过研究铜基材料中CuO₄单元的空穴掺杂效应，探寻其实空间结构。我们分析了从空穴掺杂CuO₂层中相分离的空穴掺杂CuO₄聚集体，依据本研究定义的分离压力指数展开研究。我们的研究表明，每个d波库珀对是受反铁磁空穴二聚体（AHD）保护的反铁磁耦合自旋二聚体，且AHD的反铁磁链为这类自旋二聚体的集体移动提供了无扰动的通道。基于这些结论及其蕴含的意义，我们探究了铜基超导体若干看似令人困惑的观测现象的成因，发现这些现象均可由上述结论自然解释。
英文摘要
The observation that the coherence lengths in cuprate superconductors are extremely small motivated us to search for its real-space structure by examining the consequence of hole-doping in CuO4 units in cuprates. We analyzed aggregates of hole-doped CuO4 units that phase-separate from hole-doped CuO2 layers in terms of their segregation-pressure indices defined in this work. Our search suggests that each d-wave Cooper pair is an antiferromagnetically coupled spin dimer protected in an antiferromagnetic hole dimer (AHD), and that the antiferromagnetic chains of AHDs provide channels through which such spin dimers can move collectively without perturbation. Based on these suggestions and their implications, we examined the causes for several seemingly puzzling observations on cuprate superconductors to find that they are naturally explained by the suggestions.
Comments52 pages, 17 figures, 1 table
