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Strong magnetic frustration and anti-site disorder causing spin-glass behavior in honeycomb Li2RhO3
journal contribution
posted on 2018-08-07, 12:16 authored by Vamshi M. Katukuri, Satoshi Nishimoto, Ioannis RousochatzakisIoannis Rousochatzakis, Hermann Stoll, Jeroen van den Brink, Liviu HozoiWith large spin-orbit coupling, the electron configuration in d-metal oxides is prone to highly anisotropic exchange interactions and exotic magnetic properties. In 5d5 iridates, given the existing variety of crystal structures, the magnetic anisotropy can be tuned from antisymmetric to symmetric Kitaev-type, with interaction strengths that outsize the isotropic terms. By many-body electronic-structure calculations we here address the nature of the magnetic exchange and the intriguing spin-glass behavior of Li2RhO3, a 4d5 honeycomb oxide. For pristine crystals without Rh-Li site inversion, we predict a dimerized ground state as in the isostructural 5d5 iridate Li2IrO3, with triplet spin dimers effectively placed on a frustrated triangular lattice. With Rh-Li anti-site disorder, we explain the observed spin-glass phase as a superposition of different, nearly degenerate symmetry-broken configurations.
Funding
L. H. acknowledges financial support from the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG). This work is supported by SFB 1143 of the Deutsche Forschungsgemeinschaft.
History
School
- Science
Department
- Physics
Published in
Scientific ReportsVolume
5Citation
KATUKURI, V.M. ... et al, 2015. Strong magnetic frustration and anti-site disorder causing spin-glass behavior in honeycomb Li2RhO3. Scientific Reports, 5, Article number 14718.Publisher
Nature Publishing GroupVersion
- VoR (Version of Record)
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2015Notes
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/eISSN
2045-2322Publisher version
Language
- en