发表机构
Hokkaido University; National Institute for Materials Science（北海道大学; 国立材料科学研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究扩展模型引入均匀键电荷序，发现磁相内超导失稳时纵向自旋磁化率跳变仍稳健，且键电荷序定量增强该磁化率及跳变幅度。
AI 中文摘要
先前的工作[H. Yamase和M. Zafur，Phys. Rev. B \ extbf{103}，224527 (2021)]表明，当超导在磁相内连续发展时，纵向自旋磁化率会出现跳变。该分析采用了包含磁相互作用和超导相互作用的极简模型。然而，在关联电子系统中，磁相互作用和键电荷相互作用均源于相同的底层自旋-自旋交换相互作用。因此，我们通过引入均匀键电荷序来扩展该模型，以提供对系统更真实的描述。我们发现，即使在存在均匀键电荷序的情况下，纵向自旋磁化率的跳变仍然保持稳健，但均匀键电荷序在$T_c$处定量地增强了纵向自旋磁化率及跳变的幅度。
英文摘要
A previous work [H. Yamase and M. Zafur, Phys. Rev. B \textbf{103}, 224527 (2021)] showed that the longitudinal spin susceptibility exhibits a jump when the superconductivity develops continuously inside a magnetic phase. That analysis employed a minimal model containing magnetic and superconducting interactions. However, in correlated-electron systems, both magnetic and bond-charge interactions originate from the same underlying spin-spin exchange interaction. We therefore extend the model by including the uniform bond-charge order to provide a more realistic description of the system. We find that the jump of the longitudinal spin susceptibility remains robust even in the presence of uniform bond-charge order, but the uniform bond-charge order quantitatively enhances the longitudinal spin susceptibility and the size of the jump at $T_c$.
Comments24 pages, 8 figures
