（SrCuO $_2$）$_n$ /（SrTiO $_3$）$_2$超晶格中氧亚晶格重构的猝灭磁振子激发
Quenched Magnon excitations by oxygen sublattice reconstruction in (SrCuO$_2$)$_n$/(SrTiO$_3$)$_2$ superlattices
摘要：
利用共振非弹性X射线散射（RIXS）研究了最近发现的铜氧化物超晶格（SrCuO $_2$）$_n$ /（SrTiO $_3$）$_2$在$n=5$临界值附近的结构重构.我们发现，在$n$的临界值，铜氧化物层主要保持在块体状的二维结构与少数的Cu块被重建。的部分重建导致淬火的磁振子开始在$Γ$ -点由于作为散射点的少数斑。虽然在相对丰度上相当，但电子掺杂铜酸盐超导体中的掺杂电荷杂质不显示这种磁激发的淬灭。
英文摘要：
The recently discovered structural reconstruction in the cuprate superlattice (SrCuO$_2$)$_n$/(SrTiO$_3$)$_2$ has been investigated across the critical value of $n=5$ using resonant inelastic x-ray scattering (RIXS). We find that at the critical value of $n$, the cuprate layer remains largely in the bulk-like two-dimensional structure with a minority of Cu plaquettes being reconstructed. The partial reconstruction leads to quenching of the magnons starting at the $Γ$-point due to the minority plaquettes acting as scattering points. Although comparable in relative abundance, the doped charge impurities in electron-doped cuprate superconductors do not show this quenching of magnetic excitations.
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