Hybridization effects and bond-disproportionation in the bismuth perovskites

Kateryna Foyevtsova, Arash Khazraie, Ilya Elfimov +1

We propose a microscopic description of the bond-disproportionated insulating state in the bismuth perovskites $X$BiO${}_3$ ($X$=Ba, Sr) that recognizes the bismuth-oxygen hybridizat…