Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.116805
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Funding
- NDSEG
- DOD-ARO [W911NF-11-1-0200]
- NSF [DMR-0747808]
- Research Corporation
- U.S. DOE [DEAC02-06CH11357]
- MSED of the U.S. Department of Energy
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [747808] Funding Source: National Science Foundation
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Using resonant x-ray spectroscopies combined with density functional calculations, we find an asymmetric biaxial strain-induced d-orbital response in ultrathin films of the correlated metal LaNiO3 which are not accessible in the bulk. The sign of the misfit strain governs the stability of an octahedral breathing distortion, which, in turn, produces an emergent charge-ordered ground state with an altered ligand-hole density and bond covalency. Control of this new mechanism opens a pathway to rational orbital engineering, providing a platform for artificially designed Mott materials.
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