First-principles Landau-like potential for BiFeO${}_3$ and related materials

Natalya S. Fedorova, Dmitri E. Nikonov, Hai Li +2

In this work we introduce the simplest, lowest-order Landau-like potential for BiFeO${}_3$ and La-doped BiFeO${}_3$ as an expansion around the paraelectric cubic phase in powers of pol…