Interpocket Pairing and Gap Symmetry in Fe-Based Superconductors with Only Electron Pockets
Interpocket Pairing and Gap Symmetry in Fe-Based Superconductors with Only Electron Pockets
Pairing symmetry in recently discovered Fe-based metallic superconductors AFe$_2$Se$_2$ (A = K, Rb, Cs) with high transition temperature $T_c \sim 40$ K is currently a subject of intensive debates. These systems contain only electron pockets, according to photoemission, and differ from the majority of Fe-based superconductors in which both electron …