Fig. 5: Vertex mediated five-fold enhancement in Tc on intercalation.
From: Vertex dominated superconductivity in intercalated FeSe
The orbital projected magnetic Γph,m (a, b) and pairing Γpp (c, d) vertex functions show a factor of ~5 enhancement in the dxy channel, while a factor of ~3 enhancement in the dyz,xz channels on intercalation. The enhancement in Tc directly correlates with enhancement in pairing vertex strength in the dxy channel.
