We study the lattice dynamics of antiferromagnetic transition-metal oxides by using self-consistent Hubbard functionals. We calculate the ground states of the oxides with the on-site and intersite Hubbard interactions determined self-consistently within the framework of density functional theory. The on-site and intersite Hubbard terms fix the errors associated with the electron self-interaction in the local and semilocal functionals. Inclusion of the intersite Hubbard terms in addition to the on-site Hubbard terms produces accurate phonon dispersion of the transition-metal oxides. Calculated Born effective charges and high-frequency dielectric constants are in good agreement with experiment. Our study provides a computationally inexpensive and accurate set of first-principles calculations for strongly-correlated materials and related phenomena.
@article{arxiv.2205.02972,
title = {Lattice dynamical properties of antiferromagnetic oxides calculated using self-consistent extended Hubbard functional method},
author = {Wooil Yang and Bo Gyu Jang and Young-Woo Son and Seung-Hoon Jhi},
journal= {arXiv preprint arXiv:2205.02972},
year = {2022}
}