ELECTRONIC-STRUCTURE CRITICAL PARAMETERS FROM FINITE-SIZE-SCALING

We present finite-size scaling and phenomenological renormalization eq uations for calculations of the critical points of the electronic stru cture of atoms and molecules. Results show that the method is efficien t and very accurate for estimating the critical screening length for o ne-electron screened Coulomb potentials and the critical nuclear charg e for two-electron atoms. The method has potential applicability for m any-body quantum systems. [S0031-9007(97)04408-6].