| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Gibbs, Alexandra S.
ISIS Neutron and Muon Source
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2022The crystal and defect structures of polar KBiNb 2 O 7
- 2022Low-intermediate-temperature, high-pressure thermoelastic and crystallographic properties of thermoelectric clausthalite (PbSe-I)citations
- 2022Competing spin-orbital singlet states in the 4d4 honeycomb ruthenate Ag3LiRu2O6citations
- 2022The crystal and defect structures of polar KBiNb2O7
- 2021Disorder-induced structural complexity in the barlowite family of S = 1/2 kagomé magnetscitations
- 2021Disentangling the phase sequence and correlated critical properties in Bi0.7La0.3FeO3 by structural studiescitations
- 2019Pressure-induced collapse of the spin-orbital Mott state in the hyperhoneycomb iridate β-Li2IrO3citations
- 2017Cation disorder and phase transitions in the structurally complex solar cell material Cu2ZnSnS4citations
- 2017Robust Bain distortion in the premartensite phase of a platinum-substituted Ni2MnGa magnetic shape memory alloycitations
- 2011High-temperature phase transitions of hexagonal YMnO3citations
Places of action
| Organizations | Location | People |
|---|
article
Pressure-induced collapse of the spin-orbital Mott state in the hyperhoneycomb iridate β-Li2IrO3
Abstract
<p>Hyperhoneycomb iridate β-Li<sub>2</sub>IrO<sub>3</sub> is a three-dimensional analog of two-dimensional honeycomb iridates, such as α-Li<sub>2</sub>IrO<sub>3</sub>, which recently appeared as another playground for the physics of Kitaev-type spin liquid. β-Li<sub>2</sub>IrO<sub>3</sub> shows a noncollinear spiral ordering of spin-orbital-entangled J<sub>eff</sub> = 1/2 moments at low temperatures below 38 K, which is known to be suppressed under a pressure of similar to ∼2 GPa. In addition, a structural transition is observed at P<sub>s</sub> ∼ 4 GPa at room temperature. Using the neutron powder diffraction technique, the crystal structure in the high-pressure phase of β-Li<sub>2</sub>IrO<sub>3</sub> above P<sub>S</sub> was refined, which indicates the formation of Ir<sub>2</sub> dimers on the zigzag chains, with an Ir-Ir distance of ∼ 2.66 <i>Å</i>, even shorter than that of metallic Ir. We argue that the strong dimerization stabilizes the bonding molecular-orbital state comprising the two local d<sub>zx</sub>, orbitals in the Ir-O<sub>2</sub> -Ir bond plane, which conflicts with the equal superposition of d<sub>xy</sub>, d<sub>yz</sub>, and d<sub>zx</sub>, orbitals in the J<sub>eff</sub> = 1/2 wave function produced by strong spin-orbit coupling. The results of resonant inelastic x-ray scattering measurements and the electronic structure calculations are fully consistent with the collapse of the J<sub>eff</sub> = 1/2 state. The competition between the spin-orbital-entangled J<sub>eff</sub> = 1/2 state and molecular-orbital formation is most likely universal in honeycomb-based Kitaev materials.</p>