SEARCH Articles Figures Tables Density electronic structures Density function method Density functional methods Density functional theory electrons Density functional theory methods Electron Methods Electron density function Electron density functionals Electron density method Electron density structure Electron functionalization Electron structure methods Electronic density function Electronic structure density-functional theory Electronic structure methods Function periodic Functionalization methods Periodic density functional theory Periodic electronic structures Periodic methods Periodical Structures Structural density Structural function method Structural methods Structural theory Structure theory Theory method