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Title: Strongly frustrated triangular spin lattice emerging from triplet dimer formation in honeycomb Li2IrO3
Authors: Nishimoto, Satoshi
Katukuri, Vamshi M.
Yushankhai, Viktor
Stoll, Hermann
Roessler, Ulrich K.
Hozoi, Liviu
Rousochatzakis, Ioannis
van den Brink, Jeroen
Issue Date: 2016
Publisher: Nature Publishing Group
Citation: NISHIMOTO, S. ... et al, 2016. Strongly frustrated triangular spin lattice emerging from triplet dimer formation in honeycomb Li2IrO3. Nature Communications, 7, Article number 10273.
Abstract: Iridium oxides with a honeycomb lattice have been identified as platforms for the much anticipated Kitaev topological spin liquid: the spin-orbit entangled states of Ir4+in principle generate precisely the required type of anisotropic exchange. However, other magnetic couplings can drive the system away from the spin-liquid phase. With this in mind, here we disentangle the different magnetic interactions in Li2IrO3, a honeycomb iridate with two crystallographically inequivalent sets of adjacent Ir sites. Our ab initio many-body calculations show that, while both Heisenberg and Kitaev nearest-neighbour couplings are present, on one set of Ir-Ir bonds the former dominates, resulting in the formation of spin-triplet dimers. The triplet dimers frame a strongly frustrated triangular lattice and by exact cluster diagonalization we show that they remain protected in a wide region of the phase diagram.
Description: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Sponsor: Partial financial support from the German Research Foundation (HO-4427 and SFB 1143) is gratefully acknowledged.
Version: Published
DOI: 10.1038/ncomms10273
URI: https://dspace.lboro.ac.uk/2134/34332
Publisher Link: https://doi.org/10.1038/ncomms10273
ISSN: 2041-1723
Appears in Collections:Published Articles (Physics)

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