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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

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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
Subjects: Q Science > QC Physics
Q Science > QD Chemistry
T Technology > TN Mining engineering. Metallurgy
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:
DateEvent
4 May 2016Published
13 April 2016Accepted
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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