Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor : Nature
(a) Fermi-surface mapping of single-layer FeSe measured at 20 K that consists only of the electron-like Fermi-surface sheet (γ) around M(π,π). (b) Fermi-surface mapping of (Tl,Rb) x Fe 2−y Se 2 superconductor (T c =32 K) that consists of electron-like Fer...