论文标题
通过干燥海洋的二维孔掺杂哈伯德模型转移超导穹顶：在过度范围内增强的D波配对
Shifting superconducting dome of two-dimensional hole-doped Hubbard model by a dry Fermi sea: enhanced d-wave pairing in the overdoped regime
论文作者
论文摘要
在无限层（IL）镍酸盐超导体的电子带结构中存在极小的电子口袋的动机，我们系统地探索了受二维Hubbard模型的超导（SC）特性，受到额外的传导带影响的二维Hubbard模型。我们的动态群集量子蒙特卡洛计算表明，这种额外的干金属层的异常影响，它将相关的哈伯德层的SC圆顶转移到了超额型状态下，即可以在超过（不足的）状态下增强$ d $ -Wave SC（抑制）。同时，伪PSEUDOGAP（PG）跨界线也转移到了相同的更高兴奋剂方案。我们的分析揭示了有效的配对相互作用，配对场敏感性和抗磁性自旋波动在基本的非单调物理学中的相互作用。我们假设在干燥的额外传导带的情况下，SC圆顶偏移的物理图片是根据Kondo型电子孔结合的。我们的调查为通过外部干带提供了有关调整SC特性的宝贵新见解。
Motivated by the presence of an extremely small electron pocket in the electronic band structure of infinite-layer (IL) nickelate superconductors, we systematically explore the superconducting (SC) properties of a two-dimensional Hubbard model influenced by an additional conduction band with small occupancy (dry Fermi sea). Our dynamic cluster quantum Monte Carlo calculations demonstrated the unusual impact of this additional dry metallic layer, which shifts the SC dome of the correlated Hubbard layer towards the overdoped regime, namely the $d$-wave SC can be enhanced (suppressed) in the overdoped (underdoped) regime. Simultaneously, the pseudogap (PG) crossover line shifts to the same higher doping regime as well. Our analysis revealed the interplay of the effective pairing interaction, pair-field susceptibility, and antiferromagnetic spin fluctuation in the underlying non-monotonic physics. We postulate on the physical picture of SC dome shift in terms of the Kondo-type electron-hole binding in the case of a dry additional conduction band. Our investigation provided valuable new insights on tuning the SC properties via external dry bands.
