We use first-principles theory to predict that the application of uniaxial compressive strain leads to a transition from an antiferromagnetic insulator to a ferromagnetic half-metal phase in LaMnO3. We identify the Q2 Jahn-Teller mode as the primary mechanism that drives the transition, indicating that this mode can be used to tune the lattice, charge, and spin coupling. Applying ≃ 6 GPa of uniaxial pressure along the [010] direction activates the transition to a half-metallic pseudo-cubic state. The half-metallicity opens the possibility of producing colossal magnetoresistance in the stoichiometric LaMnO3 compound at significantly lower pressure compared to recently observed investigations using hydrostatic pressure.
@article{arxiv.1602.07984,
title = {Uniaxial pressure induced half-metallic ferromagnetic phase transition in LaMnO$_3$},
author = {Pablo Rivero and Vincent Meunier and William Shelton},
journal= {arXiv preprint arXiv:1602.07984},
year = {2016}
}