Direct evidence of a zigzag spin chain structure in the honeycomb lattice: A neutron and x-ray diffraction investigation on single crystal $\mathrm{N}{\mathrm{a}}_2\mathrm{Ir}{\mathrm{O}}_3$

Abstract

We have combined single crystal neutron and x-ray diffractions to investigate the magnetic and crystal structures of the honeycomb lattice $\mathrm{N}{\mathrm{a}}_2\mathrm{Ir}{\mathrm{O}}_3$. The system orders magnetically below $18.1(2)$ K with Ir${}^{4+}$ ions forming zigzag spin chains within the layered honeycomb network with ordered moment of $0.22(1){\mu }_{\mathrm{B}}$/Ir site. Such a configuration sharply contrasts the N{é}el or stripe states proposed in the Kitaev-Heisenberg model. The structure refinement reveals that the Ir atoms form nearly ideal 2D honeycomb lattice while the $\mathrm{Ir}{\mathrm{O}}_6$ octahedra experience a trigonal distortion that is critical to the ground state. The results of this study provide much-needed experimental insights into the magnetic and crystal structure crucial to the understanding of the exotic magnetic order and possible topological characteristics in the 5$d$-electron based honeycomb lattice.

Revised version as that to appear in PRB

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Cited by in corpus (278)

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• Variational study of the Kitaev-Heisenberg-Gamma model
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• Unusual magnetic phases in the strong interaction limit of two-dimensional topological band insulators in transition metal oxides
• Vison Crystals in an Extended Kitaev Model on the Honeycomb Lattice
• Structural, Magnetic, and Electrical Properties of Li2Ir1-xRuxO3
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• Magnetic field-induced evolution of intertwined orders in the Kitaev magnet $\beta$-Li${}_2$IrO${}_3$
• Spin dynamics and field-induced magnetic phase transition in the honeycomb Kitaev magnet $\alpha$-Li${}_2$IrO${}_3$
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• Chemical- and hydrostatic-pressure effects on the Kitaev honeycomb material Na${}_2$IrO${}_3$
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• Bond ordering and phase transitions in Na${}_2$IrO${}_3$ under high pressure
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• Observation of metallic surface states in the strongly correlated Kitaev-Heisenberg candidate Na2IrO3
• Dynamical properties of the honeycomb-lattice Iridates $\mathrm{N}{\mathrm{a}}_2\mathrm{Ir}{\mathrm{O}}_3$
• Topological phase transition to Abelian anyon phases due to off-diagonal exchange interaction in the Kitaev spin liquid state
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• Effect of ring-exchange interactions in the extended Kitaev honeycomb model
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• Spin-orbit effects in pentavalent Iridates: Models and materials
• Three-band Hubbard model for Na${}_2$IrO${}_3$: Topological insulator, zigzag antiferromagnet, and Kitaev-Heisenberg material
• Generic model for hyperkagome iridate in the local moment regime
• Successive spin-flop transitions of Neel-type antiferromagnet Li${}_2$MnO${}_3$ single crystal with honeycomb-lattice
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• First-principles Study on the Magnetic Interactions in Honeycomb Na2IrO3
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• Tuning into the Kitaev spin liquid phase:A spin model on the honeycomb lattice with two types of Heisenberg exchange couplings
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• Comparing the influence of Floquet dynamics in various Kitaev-Heisenberg materials
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• Spin Waves and Dirac Magnons in a Honeycomb Lattice Zig-zag Antiferromagnet BaNi2(AsO4)2
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• Phonon Dynamics in the Generalized Kitaev Spin Liquid
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• Incarnation of Majorana Fermions in Kitaev Quantum Spin Lattice
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• Majorana Fermion Mean-Field Theories of Kitaev Quantum Spin Liquids
• Engineering the Kitaev spin liquid in a quantum dot system
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• On the multi-$\mathbf{q}$ characteristics of magnetic ground states of honeycomb cobalt oxides
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• High-temperature magnetic anomaly via suppression of antisite disorder through synthesis route modification in a Kitaev candidate Cu${}_2$IrO${}_3$
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• Dynamic structure factor of the antiferromagnetic Kitaev model in large magnetic fields
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• Phonon Dynamics in the Chiral Kitaev Spin Liquid
• Non-local features of the spin-orbit exciton in Kitaev materials
• Simulating spin systems with Majorana networks
• Phase diagram and thermal Hall conductivity of spin-liquid Kekulé-Kitaev model
• Dynamic Surface Modification due to Effusion of Na in Na${}_2$IrO${}_3$
• Phase transition of two-dimensional Ising models on the honeycomb and related lattices with striped random impurities
• Collective excitations in Na${}_2$IrO${}_3$
• Impact of disorder on dynamics and ordering in the honeycomb lattice iridate Na${}_2$IrO${}_3$
• Conductivity of Dirac-like surface states in correlated honeycomb transition metal oxide Mott insulators
• Complex orders and chirality in the classical Kitaev-$\Gamma$ model
• Low-energy spin dynamics in a Kitaev material Na3Ni2BiO6 investigated by NMR
• The ground state in a proximity to a possible Kitaev spin liquid: An undistorted honeycomb iridate NaxIrO3 (0.60 < x < 0.80)
• Probing Majorana Modes via Local Spin Dynamics
• Phase diagram for Hole-Doped Kitaev System on the Honeycomb Lattice
• Coupled spin-1/2 antiferromagnetic chain Cs${}_2$LiRuCl${}_6$ with partially disordered crystal lattice
• Ground-state phase diagram of anisotropically interacting Heisenberg-$\Gamma$ models on a honeycomb lattice
• Valence-Bond Solid phases in the spin-$1/2$ Kekule-Heisenberg model
• Field-induced phase transitions in the Kitaev-Heisenberg model: A sign-problem-free quantum Monte Carlo study and possible application to $\alpha$-RuCl3
• Enhanced Magnetism and Phase Transitions in Ultrathin Quantum Spin Liquid Na2IrO3 Flakes
• Quantum gap and spin-wave excitations in the Kitaev model on a triangular lattice
• Novel electronic state of honeycomb iridate Cu${}_2$IrO${}_3$ at high pressure
• Nature of the Topological Transition of the Kitaev Model in [111] Magnetic Field
• Temperature-dependent magnetic anisotropy from directional-dependent interactions
• The Role of the Third Dimension in Searching Majorana Fermions in $\alpha$-RuCl${}_3$ via Phonons
• Kitaev interaction and possible spin liquid state in CoI2 and Co2/3Mg1/3I2
• A comparative study of $2d$ Ising model at different boundary conditions using non-deterministic Hexagonal Cellular Automata
• Magnetic excitations in the Kitaev material Na${}_2$IrO${}_3$ studied by neutron scattering
• Phases and Quantum Phase Transitions in Anisotropic Antiferromagnetic Kitaev-Heisenberg-$\Gamma$ magnet
• Metallic conductivity on Na-deficient structural domain walls in the spin-orbit Mott insulator Na${}_2$IrO${}_3$