Kimber, Simon A. J., Mazin, I. I., Shen, Juan, Jeschke, Harald O., Streltsov, Sergey V., Argyriou, Dimitri N., Valenti, Roser and Khomskii, Daniel I. (2014). Valence bond liquid phase in the honeycomb lattice material Li2RuO3. Phys. Rev. B, 89 (8). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969
Full text not available from this repository.Abstract
The honeycomb lattice material Li2RuO3 undergoes a dimerization of Ru4+ cations on cooling below 270 degrees C, where the magnetic susceptibility vanishes. We use density functional theory calculations to show that this reflects the formation of a valence bond crystal, with a strong structural bond disproportionation. On warming, x-ray diffraction shows that discrete threefold symmetry is regained on average, and the dimerization apparently disappears. In contrast, local structural measurements using high-energy x rays show that disordered dimers survive at the nanoscale up to at least 650 degrees C. The high-temperature phase of Li2RuO3 is thus an example of a valence bond liquid, where thermal fluctuations drive resonance between different dimer coverages, a classic analog of the resonating valence bond state often discussed in connection with high-T-c cuprates.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
| Creators: |
|
||||||||||||||||||||||||||||||||||||
| URN: | urn:nbn:de:hbz:38-445675 | ||||||||||||||||||||||||||||||||||||
| DOI: | 10.1103/PhysRevB.89.081408 | ||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Phys. Rev. B | ||||||||||||||||||||||||||||||||||||
| Volume: | 89 | ||||||||||||||||||||||||||||||||||||
| Number: | 8 | ||||||||||||||||||||||||||||||||||||
| Date: | 2014 | ||||||||||||||||||||||||||||||||||||
| Publisher: | AMER PHYSICAL SOC | ||||||||||||||||||||||||||||||||||||
| Place of Publication: | COLLEGE PK | ||||||||||||||||||||||||||||||||||||
| ISSN: | 2469-9969 | ||||||||||||||||||||||||||||||||||||
| Language: | English | ||||||||||||||||||||||||||||||||||||
| Faculty: | Unspecified | ||||||||||||||||||||||||||||||||||||
| Divisions: | Unspecified | ||||||||||||||||||||||||||||||||||||
| Subjects: | no entry | ||||||||||||||||||||||||||||||||||||
| Uncontrolled Keywords: |
|
||||||||||||||||||||||||||||||||||||
| URI: | http://kups.ub.uni-koeln.de/id/eprint/44567 |
Downloads
Downloads per month over past year
Altmetric
Export
Actions (login required)
 |
View Item |