A jeff = 1/2 Kitaev material on the triangular lattice: the case of NaRuO2
- Motivated by recent reports of a quantum-disordered ground state in the triangular lattice compound NaRuO2, we derive a jeff = 1/2 magnetic model for this system by means of first-principles calculations. The pseudospin Hamiltonian is dominated by bond-dependent off-diagonal Γ interactions, complemented by a ferromagnetic Heisenberg exchange and a notably antiferromagnetic Kitaev term. In addition to bilinear interactions, we find a sizable four-spin ring exchange contribution with a strongly anisotropic character, which has been so far overlooked when modeling Kitaev materials. The analysis of the magnetic model, based on the minimization of the classical energy and exact diagonalization of the quantum Hamiltonian, points toward the existence of a rather robust easy-plane ferromagnetic order, which cannot be easily destabilized by physically relevant perturbations.
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| Author: | Aleksandar RazpopovORCiD, David A. S. KaibORCiD, Steffen BackesORCiDGND, Leon BalentsORCiD, Stephen D. WilsonORCiD, Francesco FerrariORCiD, Kira Marina RiedlORCiDGND, Roser ValentíORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-819631 |
| DOI: | https://doi.org/10.1038/s41535-023-00567-6 |
| ISSN: | 2397-4648 |
| ArXiv Id: | http://arxiv.org/abs/2212.11306 |
| Parent Title (English): | npj Quantum Materials |
| Publisher: | Nature Publishing Group |
| Place of publication: | [London] |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2023/07/13 |
| Date of first Publication: | 2023/07/13 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2024/02/06 |
| Volume: | 8 |
| Issue: | 36 |
| Article Number: | 36 |
| Page Number: | 8 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
