Valence bond liquid phase in the honeycomb lattice material Li2RuO3
(2014) In Physical Review B (Condensed Matter and Materials Physics) 89(8).- 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... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4364106
- author
- Kimber, Simon A. J. ; Mazin, I. I. ; Shen, Juan ; Jeschke, Harald O. ; Streltsov, Sergey V. ; Argyriou, Dimitri LU ; Valenti, Roser and Khomskii, Daniel I.
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 89
- issue
- 8
- article number
- 081408
- publisher
- American Physical Society
- external identifiers
-
- wos:000332420500001
- scopus:84897677581
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.89.081408
- language
- English
- LU publication?
- yes
- id
- 2383d1c1-c446-4842-a189-efd7aa1c2e81 (old id 4364106)
- date added to LUP
- 2016-04-01 14:44:08
- date last changed
- 2022-03-29 22:36:06
@article{2383d1c1-c446-4842-a189-efd7aa1c2e81,
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.}},
author = {{Kimber, Simon A. J. and Mazin, I. I. and Shen, Juan and Jeschke, Harald O. and Streltsov, Sergey V. and Argyriou, Dimitri and Valenti, Roser and Khomskii, Daniel I.}},
issn = {{1098-0121}},
language = {{eng}},
number = {{8}},
publisher = {{American Physical Society}},
series = {{Physical Review B (Condensed Matter and Materials Physics)}},
title = {{Valence bond liquid phase in the honeycomb lattice material Li2RuO3}},
url = {{http://dx.doi.org/10.1103/PhysRevB.89.081408}},
doi = {{10.1103/PhysRevB.89.081408}},
volume = {{89}},
year = {{2014}},
}