Razpopov, Aleksandar ; Kaib, David A. S. ; Backes, Steffen ; Balents, Leon ; Wilson, Stephen D. ; Ferrari, Francesco ; Riedl, Kira ; Valentí, Roser (2023)
A j_eff = 1/2 Kitaev material on the triangular lattice: the case of NaRuO₂.
In: npj Quantum Materials, 8 (36)
doi: 10.1038/s41535-023-00567-6
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Motivated by recent reports of a quantum-disordered ground state in the triangular lattice compound NaRuO₂, we derive a j_eff= 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.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Razpopov, Aleksandar ; Kaib, David A. S. ; Backes, Steffen ; Balents, Leon ; Wilson, Stephen D. ; Ferrari, Francesco ; Riedl, Kira ; Valentí, Roser |
| Art des Eintrags: | Bibliographie |
| Titel: | A j_eff = 1/2 Kitaev material on the triangular lattice: the case of NaRuO₂ |
| Sprache: | Englisch |
| Publikationsjahr: | 13 Juli 2023 |
| Verlag: | Springer Nature |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | npj Quantum Materials |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 36 |
| Kollation: | 8 Seiten |
| DOI: | 10.1038/s41535-023-00567-6 |
| Kurzbeschreibung (Abstract): | Motivated by recent reports of a quantum-disordered ground state in the triangular lattice compound NaRuO₂, we derive a j_eff= 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. |
| Fachbereich(e)/-gebiet(e): | DFG-Sonderforschungsbereiche (inkl. Transregio) DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 1487: Eisen, neu gedacht! |
| Hinterlegungsdatum: | 09 Nov 2023 08:04 |
| Letzte Änderung: | 09 Nov 2023 08:04 |
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