Multipolar fluctuations in localized 4f squared-electron systems from dynamical mean-field theory: application to PrCdNi 4
The study extends multipolar fluctuation analysis using density functional theory and dynamical mean-field theory to 4f² systems, specifically PrCdNi4. The research proposes a (3z² −r²)type antiferroquadrupolar order at q = (2π, π, 0), driven by the competition between nearest- and fourthnearest-neighbor interactions. This method is now applicable to general 4fⁿ electron systems.