Journal
PHYSICAL REVIEW B
Volume 93, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.93.134110
Keywords
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Funding
- NSF [DMR-1505549]
- MRSEC Program of the National Science Foundation [DMR 1121053]
- ARO [W911NF-13-1-0059]
- ARO DURIP Award [W911NF-13-1-0293]
- Institute for Quantum Information and Matter, an NSF Physics Frontiers Center [PHY-1125565]
- Gordon and Betty Moore Foundation [GBMF1250]
- Caltech WAVE Fellows program
- Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy [DE-AC05-00OR22725]
- Direct For Mathematical & Physical Scien [1505549] Funding Source: National Science Foundation
- Division Of Materials Research [1505549] Funding Source: National Science Foundation
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A complete structural solution of the bilayer iridate compound Sr3Ir2O7 presently remains outstanding. Previously reported structures for this compound vary and all fail to explain weak structural violations observed in neutron scattering measurements as well as the presence of a net ferromagnetic moment in the basal plane. In this paper, we present single crystal neutron diffraction and rotational anisotropy second harmonic generation measurements unveiling a lower, monoclinic symmetry inherent to Sr3Ir2O7. Combined with density functional theory, our measurements identify the correct structural space group as No. 15 (C2/c) and provide clarity regarding the local symmetry of Ir4+ cations within this spin-orbit Mott material.
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