论文标题
在Kagome超导体CSV3SB5中，有效的最小模型和非常规的旋转配对
Effective minimal model and unconventional spin-singlet pairing in Kagome superconductor CsV3Sb5
论文作者
论文摘要
最近合成的Kagome化合物AV $ _3 $ SB $ _5 $由于拓扑，电荷密度波和超导性的异常共存而引起了极大的关注。在此{\ it Letter}中，基于CSV $ _3 $ _3 $ SB $ _5 $的频段结构，我们适合低能过程的有效的6波段模型；利用有效最小模型上的随机相近似（RPA），我们获得了归因于自旋 - 触发配对机制的动量分辨的静态自旋敏感性，我们发现超导配对强度随着coulomb相关性的提升而增加，并且与超级传导配对的态度相关性，与超级传导配对的函数相关，gap函数是旋转的，gap函数是gap函数的，中间至强库仑相关的Y轴，表明Kagome化合物中的非常规超导性AV $ _3 $ SB $ _5 $。
Recently synthesized Kagome compounds AV$_3$Sb$_5$ attract great attention due to the unusual coexistence of the topology, charge density wave and superconductivity. In this {\it Letter}, based on the band structures for CsV$_3$Sb$_5$ in pristine phase, we fit an effective 6-band model for the low-energy processes; utilizing the random phase approximation (RPA) on the effective minimal model, we obtain the momentum-resolved static spin susceptibility attributing the spin-fluctuation pairing mechanism, we find that the superconducting pairing strengths increase with the lift of the Coulomb correlation, and the superconductive pairing symmetry is singlet, the gap functions are antisymmetric with respect to the x-axis and the y-axis in the intermediate to strong Coulomb correlated regime,indicating the unconventional superconductivity in Kagome compounds AV$_3$Sb$_5$.
