Lattice dynamics and ferroelectric properties of the nitride perovskite ${\mathrm{LaWN}}_3$

Yue-Wen Fang, Craig A. J. Fisher, Akihide Kuwabara +5

Using first-principles calculations we examine the crystal structures and phase transitions of nitride perovskite LaWN${}_3$. Lattice dynamics calculations indicate that the ground-s…