Fig. 4: Structure-property relationship revealed from high-pressure studies and survey of many n > 1 RP perovskites.

a Symmetric factor as a function of structural descriptor χ for various 2D RP perovskites under pressure regulation or with chemical tailoring using different LA and A cations and n values. b LA and A cations that are incorporated in the intra and interlayer structures of 2D perovskites tabulated in (a). Each cation is assigned an abbreviation. Source data are provided as a Source Data file.