Ba8CoNb6O24: a spin-1/2 triangular-lattice Heisenberg antiferromagnet in the 2D limit

Abstract

The perovskite Ba8CoNb6O24 comprises equilateral effective spin-1/2 Co2+ triangular layers separated by six non-magnetic layers. Susceptibility, specific heat and neutron scattering measurements combined with high-temperature series expansions and spin-wave calculations confirm that Ba8CoNb6O24 is basically a twodimensional (2D) magnet with no detectable spin anisotropy and no long-range magnetic ordering down to 0.06 K. In other words, Ba8CoNb6O24 is very close to be a realization of the paradigmatic spin-1/2 triangular Heisenberg model, which is not expected to exhibit symmetry breaking at finite temperature according to the Mermin and Wagner theorem.

arXiv comment8 pages, 5 figures with SI

References in corpus (24)

• Quantum Spin Liquids
• Proximate Kitaev Quantum Spin Liquid Behaviour in α-RuCl${}_3$
• Linear spin wave theory for single-Q incommensurate magnetic structures
• Long range Neel order in the triangular Heisenberg model
• Neel order in square and triangular lattice Heisenberg models
• Fractional spinon excitations in the quantum Heisenberg antiferromagnetic chain
• Experimental Realization of Spin-1/2 Triangular-Lattice Heisenberg Antiferromagnet
• Spin-waves in triangular lattice antiferromagnet: decays, spectrum renormalization, and singularities
• Fractional excitations in the square-lattice quantum antiferromagnet
• Magnetization Process and Collective Excitations in the S=1/2 Triangular-Lattice Heisenberg Antiferromagnet Ba3CoSb2O9
• Competing Spin Liquid States in the Spin-$1/2$ Heisenberg Model On Triangular Lattice
• Excitation spectra of the spin-1/2 triangular-lattice Heisenberg antiferromagnet
• Cascade of magnetic-field-induced quantum phase transitions in a spin $1/2$ triangular-lattice antiferromagnet
• Static and Dynamical Properties of the Spin-1/2 Equilateral Triangular-Lattice Antiferromagnet Ba${}_3$CoSb${}_2$O${}_9$
• Dynamical structure factor of triangular-lattice antiferromagnet
• Specific heat of quasi-2D antiferromagnetic Heisenberg models with varying inter-planar couplings
• Quantum phase diagram of the $S=1/2$ triangular-lattice antiferromagnet Ba${}_3$CoSb${}_2$O${}_9$
• The Quasi-1D S=1/2 Antiferromagnet Cs2CuCl4 in a Magnetic Field
• Detection of XY behaviour in weakly anisotropic quantum antiferromagnets on the square lattice
• Magnons and Excitation Continuum in XXZ triangular antiferromagnetic model: Application to $B{a}_{3}CoS{b}_2{O}_9$
• Thermodynamics of the Up-Up-Down Phase of the S = 1/2 Triangular-Lattice Antiferromagnet Cs${}_2$CuBr${}_4$
• High temperature series expansion study of the Heisenberg antiferromagnet on the hyperkagome lattice: Comparison with Na${}_4$Ir${}_3$O${}_8$
• Monte Carlo Study of the Anisotropic Heisenberg Antiferromagnet on the Triangular Lattice
• Low-energy properties of two-dimensional quantum triangular antiferromagnets: Non-perturbative renormalization group approach

Cited by in corpus (34)

• Pseudospin exchange interactions in d^7 cobalt compounds: Possible realization of the Kitaev model
• Field-tunable quantum disordered ground state in the triangular lattice antiferromagnet NaYbO${}_2$
• Disorder-Induced Mimicry of a Spin Liquid in YbMgGaO${}_4$
• Anisotropic field-induced ordering in the triangular-lattice quantum spin liquid NaYbSe${}_2$
• Materials design of Kitaev spin liquids beyond the Jackeli-Khaliullin mechanism
• Kosterlitz-Thouless Melting of Magnetic Order in the Triangular Quantum Ising Material TmMgGaO${}_4$
• The low-temperature highly correlated quantum phase in the charge-density-wave 1T-TaS_2 compound
• Spin liquids in geometrically perfect triangular antiferromagnets
• Spin excitations in the frustrated triangular lattice antiferromagnet NaYbO${}_2$
• Two-temperature scales in the triangular-lattice Heisenberg antiferromagnet
• Spin Supersolidity in Nearly Ideal Easy-axis Triangular Quantum Antiferromagnet Na${}_2$BaCo(PO${}_4$)${}_2$
• Quantum magnetic properties of the spin-1/2 triangular-lattice antiferromagnet Ba${}_2$La${}_2$CoTe${}_2$O${}_{12}$
• Towards Kitaev Spin Liquid in 3d Transition Metal Compounds
• Thermal Tensor Renormalization Group Simulations of Square-Lattice Quantum Spin Models
• Mermin-Wagner physics, (H,T) phase diagram, and candidate quantum spin-liquid phase in the spin-1/2 triangular-lattice antiferromagnet Ba8CoNb6O24
• Exact diagonalization and cluster mean-field study of triangular-lattice XXZ antiferromagnets near saturation
• Thermodynamic properties of an $S=1/2$ ring-exchange model on the triangular lattice
• Magnetic and charge susceptibilities in the half-filled triangular lattice Hubbard model
• Mott transition, Widom line and pseudogap in the half-filled triangular lattice Hubbard model
• Magnetic interactions in the tripod-kagome antiferromagnet Mg${}_2$Gd${}_3$Sb${}_3$O${}_{14}$ probed by static magnetometry and high-field ESR spectroscopy
• Ba8MnNb6O24: a model two-dimensional spin-5/2 triangular lattice antiferromagnet
• Double magnetic transitions and exotic field induced phase in the triangular lattice antiferromagnets Sr${}_3$Co(Nb,Ta)${}_2$O${}_9$
• Ground-state and thermodynamic properties of the spin-$\frac{1}{2}$ Heisenberg model on the anisotropic triangular lattice
• Tracking the evolution from isolated dimers to many-body entanglement in NaLu${}_x$Yb${}_{1-x}$Se${}_2$
• Exotic magnetic field-induced spin-superstructures in a mixed honeycomb triangular lattice system
• Anomalous continuum scattering and higher-order van Hove singularity in the strongly anisotropic S = 1/2 triangular lattice antiferromagnet
• Efficient tensor network algorithm for layered systems
• Reinvestigation of the homogeneous spin model in YbMgGaO${}_4$
• Effect of hole doping on the 120 degree order in the triangular lattice Hubbard model: A Hartree-Fock revisit
• Topical review: the nature of the ground state and possibility of a quantum spin liquid in 1T metal dichalcogenides
• Spin disorder state induced by Mg${}^{2+}$ doping in a Kitaev material Na${}_3$Co${}_2$SbO${}_6$
• Finite Spinon Density-of-States in Triangular-Lattice Delafossite TlYbSe${}_2$
• Magnetic ground state of a Jeff = 1/2 based frustrated triangular lattice antiferromagnet
• Specific heat and susceptibility of S=1/2 antiferromagnets on square, triangular, and kagome lattices