Observation of strong-coupling pairing with weakened Fermi-surface nesting at optimal hole doping in Ca${}_{0.33}$Na${}_{0.67}$Fe${}_2$As${}_2$

Y. -B. Shi, Y. -B. Huang, X. -P. Wang +12

We report an angle-resolved photoemission investigation of optimally-doped Ca${}_{0.33}$Na${}_{0.67}$Fe${}_2$As${}_2$. The Fermi surface topology of this compound is similar to that of the…