Robustness of s-wave Pairing in Electron-Overdoped ${\text{A}}_{1-y}{\text{Fe}}_{2-x}{\text{Se}}_2$

Chen Fang, Yang-Le Wu, Ronny Thomale +2

Using self consistent mean field and functional renormalization group approaches we show that s-wave pairing symmetry is robust in the heavily electron-doped iron chalcogenides $(\…