| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sanna, Samuele
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2022Structure and magnetic properties of Fe-Co alloy nanoparticles synthesized by pulsed-laser inert gas condensationcitations
- 2022Entanglement between muon and I > 1/2 nuclear spins as a probe of charge environmentcitations
- 2021Strain-tuning of nematicity and superconductivity in single crystals of FeSecitations
- 2020Doping Evolution of the Local Electronic and Structural Properties of the Double Perovskite Ba2Na1-xCaxOsO6citations
- 2020Doping Evolution of the Local Electronic and Structural Properties of the Double Perovskite Ba$_{2}$Na$_{1–x}$Ca$_{x}$OsO$_{6}$citations
- 2016Persistence of slow dynamics in Tb(OETAP)2 single molecule magnets embedded in conducting polymerscitations
- 2012Magnetic properties of spin-diluted iron pnictides from μSR and NMR in LaFe1−xRuxAsO
- 2012Magnetic properties of spin-diluted iron pnictides from μSR and NMR in LaFe1-xRuxAsOcitations
- 201019F NMR study of the coupling between 4f and itinerant electrons in the pnictide superconductors SmFeAsO1-xFx (0.15 ≤ x ≤ 0.2)citations
- 2010Magnetic states of lightly hole-doped cuprates in the clean limit as seen via zero-field muon spin spectroscopycitations
- 201019F NMR study of the coupling between 4f and itinerant electrons in the pnictide superconductors SmFeAsO1-xFxcitations
- 2009Effect of the double doping mechanism on the phase diagram of Y1-xCaxBa2Cu3O6+ycitations
- 2002Magnetic susceptibility of the Cluster Compounds Mo6Se8 and Mo6Te8
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article
Doping Evolution of the Local Electronic and Structural Properties of the Double Perovskite Ba2Na1-xCaxOsO6
Abstract
We present a combined experimental and computational study of the effect of charge doping in the osmium based double perovskite Ba<sub>2</sub>Na<sub>1–<i>x</i></sub>Ca<sub><i>x</i></sub>OsO<sub>6</sub> for 0 ≤ <i>x</i> ≤ 1 in order to provide a structural and electronic basis for understanding this complex Dirac–Mott insulator material. Specifically, we investigate the effects of the substitution of monovalent Na with divalent Ca, a form of charge doping or alloying that nominally tunes the system from Os<sup>7+</sup> with a 5d<sup>1</sup> configuration to Os<sup>6+</sup> with 5d<sup>2</sup> configuration. After an X-ray diffraction characterization, the local atomic and electronic structure has been experimentally probed by X-ray absorption fine structure at all the cation absorption edges at room temperature; the simulations have been performed using ab initio density functional methods. We find that the substitution of Na by Ca induces a linear volume expansion of the crystal structure which indicates an effective alloying due to the substitution process in the whole doping range. The local structure corresponds to the expected double perovskite one with rock-salt arrangement of Na/Ca in the B site and Os in the B′ one for all the compositions. X-ray absorption near edge structure measurements show a smooth decrease of the oxidation state of Os from 7+ (5d<sup>1</sup>) to 6+ (5d<sup>2</sup>) with increasing Ca concentration, while the oxidation states of Ba, Na, and Ca are constant. This indicates that the substitution of Na by Ca gives rise to an effective electron transfer from the B to the B′ site. The comparison between X-ray absorption measurements and ab initio simulations reveals that the expansion of the Os–O bond length induces a reduction of the crystal field splitting of unoccupied Os derived d states.