Fig. 3: Layer effect.
From: Ab initio quantum many-body description of superconducting trends in the cuprates
Structures of (A) single-layer Hg-1201 (HgBa2CuO4) and (B) double-layer Hg-1212 (HgBa2CaCu2O6). C Comparison between calculated d-wave SC orders mSC (bar) and pairing gaps Eg (cross marker) (Hg-1201, Hg-1212, and CCO) and experimental Tc (data from refs. 7,35) as a function of the number of layers per cell. D AFM, SC orders m, and estimated SC gap Eg of different compound structures (Hg-1201, oxidized Hg-1212, and reduced Hg-1212). E Electron density difference between oxidized and reduced Hg-1212 at optimal doping (red: increased electron density of oxidized vs. reduced, blue: decreased electron density). The arrow indicates the transfer of charge between reduced and oxidized structures.
