Narayan, A (2020) Effect of strain and doping on the polar metal phase in LiOsO3. In: Journal of Physics Condensed Matter, 32 (12).
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Abstract
We systematically investigate the effect of strain and doping on the polar metal phase in lithium osmate, LiOsO3, using first-principles calculations. We demonstrate that the polar metal phase in LiOsO3 can be controlled by biaxial strain. Based on density functional calculations, we show that a compressive biaxial strain enhances the stability of the polar R3c phase. On the other hand, a tensile biaxial strain favors the centrosymmetric R3̄c structure. Thus, strain emerges as a promising control parameter over polar metallicity in this material. We uncover a strain-driven quantum phase transition under tensile strain, and highlight intriguing properties that could emerge in the vicinity of this polar to non-polar metal transition. We examine the effect of charge doping on the polar metal phase. By means of electrostatic doping as well as supercell calculations, we find that screening from additional charge carriers, expected to suppress the polar distortions, have only a small effect on them. Rather remarkably, and in contrast to conventional ferroelectrics, the polar metal phase in LiOsO3 remains robust against charge doping up to large doping values.
| Item Type: | Journal Article |
|---|---|
| Publication: | Journal of Physics Condensed Matter |
| Publisher: | Institute of Physics Publishing |
| Additional Information: | The copyright for this article belongs to the Author. |
| Keywords: | Calculations; Density functional theory; Ferroelectricity; Lithium compounds; Metals; Osmium compounds; Phase transitions, Control parameters; Electrostatic doping; First-principles calculation; Polar distortion; Polar metals; Quantum phase transitions; Supercell calculations; Tensile biaxial strain, Tensile strain, article; density functional theory; doping; phase transition |
| Department/Centre: | Division of Chemical Sciences > Solid State & Structural Chemistry Unit |
| Date Deposited: | 04 Jan 2023 06:10 |
| Last Modified: | 04 Jan 2023 06:12 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79326 |
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