On the Origin of Zigzag Magnetic Order in Iridium Oxide Na2IrO3

Abstract

We explore the phase diagram of spin-orbit Mott insulators on a honeycomb lattice, within the Kitaev-Heisenberg model extended to its full parameter space. Zigzag-type magnetic order is found to occupy a large part of the phase diagram of the model, and its physical origin is explained as due to interorbital t2g-eg hopping. Magnetic susceptibility and spin wave spectra are calculated and compared to the experimental data, obtaining thereby the spin coupling constants in Na2IrO3 and Li2IrO3.

5 pages, 4 figures

References in corpus (9)

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• Quantum spin Hall effect in a transition metal oxide Na2IrO3
• Long range magnetic ordering in Na${}_2$IrO${}_3$
• Na2IrO3 as a spin-orbit-assisted antiferromagnetic insulator with a 340 meV gap
• Possible proximity of the Mott insulating Iridate Na2IrO3 to a topological phase: Phase diagram of the Heisenberg-Kitaev model in a magnetic field
• Spin-orbit effects in Na${}_4$Ir${}_3$O${}_8$, a hyper-kagomé lattice antiferromagnet
• Giant Magnon Gap in Bilayer Iridate Sr3Ir2O7: Enhanced Pseudo-dipolar Interactions Near the Mott Transition
• Magnetic ordering phenomena of interacting quantum spin Hall models
• Ab initio determination of excitation energies and magnetic couplings in correlated, quasi two-dimensional iridates

Cited by in corpus (5)

• Magnetic order in $\alpha$-RuCl${}_3$: a honeycomb lattice quantum magnet with strong spin-orbit coupling
• Short-range correlations in the magnetic ground state of Na4Ir3O8
• Density-Matrix Renormalization Group Study of Extended Kitaev-Heisenberg Model
• Frustration and Entanglement in Compass and Spin-Orbital Models
• Quantum phase transitions in the Kitaev--Heisenberg model on a single hexagon