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Robust singlet dimers with fragile ordering in two-dimensional honeycomb lattice of Li2RuO3
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Park, Junghwan, Tan, Teck-Yee, Adroja, D. T., Daoud-Aladine, A., Choi, Seongil, Cho, Deok-Yong, Lee, Sang-Hyun, Kim, Jiyeon, Sim, Hasung, Morioka, T., Nojiri, H., Krishnamurthy, V. V., Manuel, P., Lees, Martin R., Streltsov, S. V., Khomskii, D. I. and Park, Je-Geun (2016) Robust singlet dimers with fragile ordering in two-dimensional honeycomb lattice of Li2RuO3. Scientific Reports, 6 (1). 25238. doi:10.1038/srep25238
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Official URL: http://dx.doi.org/10.1038/srep25238
Abstract
When an electronic system has strong correlations and a large spin-orbit interaction, it often exhibits a plethora of mutually competing quantum phases. How a particular quantum ground state is selected out of several possibilities is a very interesting question. However, equally fascinating is how such a quantum entangled state breaks up due to perturbation. This important question has relevance in very diverse fields of science from strongly correlated electron physics to quantum information. Here we report that a quantum entangled dimerized state or valence bond crystal (VBC) phase of Li2RuO3 shows nontrivial doping dependence as we perturb the Ru honeycomb lattice by replacing Ru with Li. Through extensive experimental studies, we demonstrate that the VBC phase melts into a valence bond liquid phase of the RVB (resonating valence bond) type. This system offers an interesting playground where one can test and refine our current understanding of the quantum competing phases in a single compound.
| Item Type: | Journal Article | ||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry T Technology > TN Mining engineering. Metallurgy |
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| Divisions: | Faculty of Science > Physics | ||||||
| Library of Congress Subject Headings (LCSH): | Transition metal compounds, Transition metal compounds--Magnetic properties, Chemical vapor deposition, Ruthenium oxides | ||||||
| Journal or Publication Title: | Scientific Reports | ||||||
| Publisher: | Nature Publishing Group | ||||||
| ISSN: | 2045-2322 | ||||||
| Official Date: | 4 May 2016 | ||||||
| Dates: |
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| Volume: | 6 | ||||||
| Number: | 1 | ||||||
| Article Number: | 25238 | ||||||
| DOI: | 10.1038/srep25238 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access | ||||||
| Funder: | Kich’o Kwahak Yŏn’guwŏn [South Korea.Institute for Basic Science] (IBS), Russian Fundamental Science Foundation (RFSF), Universität zu Köln, Science and Technology Facilities Council (Great Britain) (STFC) | ||||||
| Grant number: | IBS-R009-G1 (IBS), 14-22-00004 (RFSF), FOR 1346 (Universität zu Köln), CMPC-09108 (STFC) |
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