Planar Thermal Hall Effects in Kitaev Spin Liquid Candidate Na2Co2TeO6

Abstract

We investigate both the longitudinal thermal conductivity (${\kappa }_{xx}$) and the planar thermal Hall conductivity (${\kappa }_{xy}$) in the Kitaev spin liquid candidate of Co-based honeycomb antiferromagnet Na${}_2$Co${}_2$TeO${}_6$ in a magnetic field ($B$) applied along the $a$ and $a^{\ast }$ axes. A finite ${\kappa }_{xy}$ is resolved for both field directions in the antiferromagnetic (AFM) phase below the Néel temperature of 27 K. The temperature dependence of ${\kappa }_{xy}/T$ shows the emergence of topological bosonic excitations. In addition, the field dependence of ${\kappa }_{xy}$ shows sign reversals at the critical fields in the AFM phase, suggesting the changes in the Chern number distribution of the topological magnons. Remarkably, a finite ${\kappa }_{xy}$ is observed in $B\parallel a^{\ast }$ between the first-order transition field in the AFM phase and the saturation field, which is prohibited in a disordered state by the two-fold rotation symmetry around the $a^{\ast }$ axis of the honeycomb lattice, showing the presence of a magnetically ordered state that breaks the two-fold rotation symmetry. Our results demonstrate the presence of topological magnons in this compound in the whole field range below the saturation field.

7 pages, 5 figures, and Supplementary Materials. To appear in Phys. Rev. Research

References in corpus (17)

• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• Topological Magnon Insulator in Insulating Ferromagnet
• Topological Nature of the Phonon Hall Effect
• Pseudospin exchange interactions in d^7 cobalt compounds: Possible realization of the Kitaev model
• Kitaev-Heisenberg Hamiltonian for High-Spin $d^7$ Mott Insulators
• Robustness of the thermal Hall effect close to half-quantization in a field-induced spin liquid state
• Hall effect of triplons in a dimerized quantum magnet
• Kitaev interactions in the Co honeycomb antiferromagnets Na${}_3$Co${}_2$SbO${}_6$ and Na${}_2$Co${}_2$TeO${}_6$
• Magnetic properties of the honeycomb oxide Na${}_2$Co${}_2$TeO${}_6$
• Zigzag antiferromagnetic ground state with anisotropic correlation lengths in the quasi-2D honeycomb lattice compound Na2Co2TeO6
• Anomalous Thermal Hall Effect in an Insulating van der Waals Magnet VI3
• Berry curvature in magnon-phonon hybrid systems
• Static and dynamic magnetic properties of honeycomb lattice antiferromagnets Na${}_2{M}_2$TeO${}_6$, $M$ = Co and Ni
• Significant thermal Hall effect in the 3$d$ cobalt Kitaev system $N{a}_{2}C{o}_{2}Te{O}_6$
• High-field thermal transport properties of the Kitaev quantum magnet alpha-RuCl3: evidence for low-energy excitations beyond the critical field
• Field-angle dependence of thermal Hall conductivity in magnetically ordered Kitaev-Heisenberg system
• Thermal Hall Effect in the Kitaev-Heisenberg System with Spin-Phonon Coupling

Cited by in corpus (27)

• Magnetic ground state of the Kitaev Na${}_2$Co${}_2$TeO${}_6$ spin liquid candidate
• Symmetry-based requirement for the measurement of electrical and thermal Hall conductivity under an in-plane magnetic field
• Thermal Transport of Fractionalized Antiferromagnetic and Field Induced States in the Kitaev Material Na${}_2$Co${}_2$TeO${}_6$
• Kitaev Quantum Spin Liquids
• Emergent SU(3) magnons and thermal Hall effect in the antiferromagnetic skyrmion lattice
• Planar thermal Hall effect from phonons in a Kitaev candidate material
• Magnetic properties and spin dynamics in a spin-orbit driven Jeff= 1/2 triangular lattice antiferromagnet
• Comparative Raman Scattering Study of Crystal Field Excitations in Co-based Quantum Magnets
• Field and Polarization Dependent Quantum Spin Dynamics in Honeycomb Magnet Na${}_2$Co${}_2$TeO${}_6$: Magnetic Excitations and Continuum
• Exchange striction induced thermal Hall effect in van der Waals antiferromagnet MnPS${}_3$
• Planar thermal Hall effect from phonons in cuprates
• Field-Angle-Resolved Specific Heat in Na${}_2$Co${}_2$TeO${}_6$: Evidence against Kitaev Quantum Spin Liquid
• Topological phase diagrams of in-plane field polarized Kitaev magnets
• On the multi-$\mathbf{q}$ characteristics of magnetic ground states of honeycomb cobalt oxides
• High Chern numbers and topological flat bands in high-field polarized Kitaev magnets on the star lattice
• Chiral spin state and nematic ferromagnet in the spin-1 Kitaev-$\Gamma$ model
• Topological phase transitions and thermal Hall effect in a noncollinear spin texture
• Spin waves in Na${}_2$Co${}_2$TeO${}_6$ studied by high-frequency/high-field ESR: Successes and failures of the triple-$\mathbf{q}$ model
• Digital Quantum Simulation of the Kitaev Quantum Spin Liquid
• Contrasting magnetothermal conductivity in sibling Co-based honeycomb-lattice antiferromagnets
• Upper branch thermal Hall effect in quantum paramagnets
• Anisotropic in-plane heat transport of Kitaev magnet Na${}_2$Co${}_2$TeO${}_6$
• Field-Angle Dependence of Phonon Thermal Hall Effect in Na2X2TeO6 (X = Co, Zn)
• Angular-Dependent Thermal Hall Effect in a Honeycomb Magnet: Disentangling Kitaev and Dzyaloshinskii-Moriya Interactions
• Real-space chirality from crystalline topological defects in the Kitaev spin liquid
• Dominant Kitaev Interaction and Field-induced Quantum Disordered Phase in the Cobaltate Na${}_2$Co${}_2$TeO${}_6$
• Anomalies in the thermal conductivity of honeycomb antiferromagnet MnPS${}_3$