A simple model for $f\to d$ transition of heavy lanthanide and actinide ions in crystals

Chang-Kui Duan, Michael F. Reid, Gang Ruan

The $f\to d$ transition model by Duan and co-workers [Phys. Rev. B {\bf 66}, 155108 (2002); J. Solid State Chem. {\bf 171}, 299 (2003)] has been very useful in interpreting the $f\…