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Uniaxial pressure induced half-metallic ferromagnetic phase transition in LaMnO$_3$
- Publication Year :
- 2016
-
Abstract
- 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 LaMnO$_3$. 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 $\simeq$ 6 GPa of uniaxial pressure along the [010] direction activates the transition to a half-metallic $\textit{pseudo-cubic}$ state. The half-metallicity opens the possibility of producing colossal magnetoresistance in the stoichiometric LaMnO$_3$ compound at significantly lower pressure compared to recently observed investigations using hydrostatic pressure.
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1602.07984
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.93.094409