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Title(s)
Title | Language |
A j_eff 12 Kitaev material on the triangular lattice: The case of NaRuO2 | en |
Author(s)
Name | ORCID | GND | Affiliation |
Faculty
13 Physics
DFG-Subject
307-02 Theoretical Condensed Matter Physics
Date Issued
07 June 2023
Publisher(s)
Goethe-Universität Frankfurt
Type(s) of data
Dataset
Language(s)
en
Abstract(s)
Abstract | Language |
Motivated by recent reports of a quantum disordered ground state in the triangular lattice compound NaRuO$_2$, we derive a $j_{\rm eff}=1/2$ magnetic model for this system by means of first-principles calculations. The pseudospin Hamiltonian is dominated by bond-dependent off-diagonal $\Gamma$ interactions, complemented by a ferromagnetic Heisenberg exchange and a notably \emph{antiferromagnetic} Kitaev term. In addition to bilinear interactions, we find a sizable four-spin ring exchange contribution with a \emph{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. | en |
Description(s)
Description | Language |
All computation details (input, output, source codes, DFT, ProjED, classical minimization, TEMA) and figures are included. In each folder the computation details with detailed README File are included. |
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