Fig. 3: Electron density difference (in atomic units) due to orbital relaxation in the d8–p6–d10 configuration.
From: Enhancement of superexchange due to synergetic breathing and hopping in corner-sharing cuprates
a, Electron density difference in the plane of CuO4 plaquettes. b, Electron density difference integrated over a sphere centred on one of the Cu atoms (full curves) as a function of the radius shown in a; the result of an additional radial integration (dashed curves) as a function of the upper integration limit.
