Spin-orbit induced mixed-spin ground state in $R$NiO${}_3$ perovskites probed by XAS: new insight into the metal to insulator transition

C. Piamonteze, F. M. F. de Groot, H. C. N. Tolentino +4

We report on a Ni L${}_{2,3}$ edges x-ray absorption spectroscopy (XAS) study in $R$NiO${}_3$ perovskites. These compounds exhibit a metal to insulator ($MI$) transition as temperature…