TY  - JOUR
A1  - Razpopov, Aleksandar
A1  - Kaib, David A. S.
A1  - Backes, Steffen
A1  - Balents, Leon
A1  - Wilson, Stephen D.
A1  - Ferrari, Francesco
A1  - Riedl, Kira Marina
A1  - Valentí, Roser
T1  - A jeff = 1/2 Kitaev material on the triangular lattice: the case of NaRuO2
T2  - npj Quantum Materials
N2  - 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.
Y1  - 2023
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/81963
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-819631
SN  - 2397-4648
VL  - 8
IS  - 36
PB  - Nature Publishing Group
CY  - [London]
ER  -