Diagrammatic description of superconductivity in elements and AnB (n = 1, 2, 3) compounds based on pseudopotential radii

► Various superconducting materials can be two-dimensionally mapped. ► The orbital electronegativity and pseudopotential radii difference are taken as coordinates. ► The generation of superconductivity is closely related to the threshold for metal-semiconductor transition. ► The diagrammatic expression is available for the search of new superconducting materials.