Proximity-induced sequence of field transitions in Kitaev candidate BaCo${}_2$(AsO${}_4$)${}_2$

Abstract

We study field-induced phase transitions of the minimal exchange model proposed earlier for BaCo${}_2$(AsO${}_4$)${}_2$, a candidate for Kitaev honeycomb model, using numerical minimization of classical spin clusters. We show that experimentally observed sequence of step-like transitions in magnetic field is realized in the phase diagram of the minimal model. Surprisingly, intermediate up-up-down plateau phase is stabilized only in the proximity of a double-zigzag$-$zigzag phase boundary. We systematically map out the region of stability of experimentally observed cascade of transitions and argue that BaCo${}_2$(AsO${}_4$)${}_2$ exchange parameters are close to a region of strong phase competition, which can explain suppressed saturation field.

7 pages, 5 figures

References in corpus (29)

• Non-Abelian Anyons and Topological Quantum Computation
• Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
• $\alpha$-RuCl3: a Spin-Orbit Assisted Mott Insulator on a Honeycomb Lattice
• Models and Materials for Generalized Kitaev Magnetism
• On the Origin of Zigzag Magnetic Order in Iridium Oxide Na2IrO3
• Pseudospin exchange interactions in d^7 cobalt compounds: Possible realization of the Kitaev model
• Kitaev-Heisenberg Hamiltonian for High-Spin $d^7$ Mott Insulators
• Hidden symmetries of the extended Kitaev-Heisenberg model: Implications for honeycomb lattice iridates A2IrO3
• Kitaev interactions in the Co honeycomb antiferromagnets Na${}_3$Co${}_2$SbO${}_6$ and Na${}_2$Co${}_2$TeO${}_6$
• Weak-field induced nonmagnetic state in a Co-based honeycomb
• Importance of anisotropic exchange interactions in honeycomb iridates. Minimal model for zigzag antiferromagnetic order in Na${}_2$IrO${}_3$
• Antiferromagnetic Kitaev interaction in $J_\rm{eff}=1/2$ cobalt honeycomb materials Na${}_3$Co${}_2$SbO${}_6$ and Na${}_2$Co${}_2$TeO${}_6$
• Spin-orbit physics of j=1/2 Mott insulators on the triangular lattice
• Geometrical frustration versus Kitaev interactions in BaCo${}_2$(AsO${}_4$)${}_2$
• A magnetic continuum observed by terahertz spectroscopy in a quantum spin liquid candidate BaCo${}_2$(AsO${}_4$)${}_2$
• XY magnetism, Kitaev exchange, and long-range frustration in the $J_{\mathrm{eff}}=1/2$ honeycomb cobaltates
• Magnetic Couplings in Edge-Sharing High-Spin $d^7$ Compounds
• Ab initio guided minimal model for the "Kitaev" material BaCo${}_2$(AsO${}_4$)${}_2$: Importance of direct hopping, third-neighbor exchange and quantum fluctuations
• Non-Kitaev vs. Kitaev Honeycomb Cobaltates
• Bond-dependent anisotropy and magnon decay in cobalt-based Kitaev triangular antiferromagnet
• Magnetism of Kitaev spin-liquid candidate material RuBr${}_3$
• Polarized-neutron investigation of magnetic ordering and spin dynamics in BaCo${}_2$(AsO${}_4$)${}_2$ frustrated honeycomb-lattice magnet
• Towards Kitaev Spin Liquid in 3d Transition Metal Compounds
• Order by quenched disorder in the model triangular antiferromagnet RbFe(MoO4)2
• Magnetic excitations of the field induced states in BaCo2(AsO4)2 probed by time-domain terahertz spectroscopy
• Real-space perturbation theory for frustrated magnets: application to magnetization plateaus
• Kitaev magnetism through the prism of lithium iridate
• Phase Diagram of YbZnGaO4 in Applied Magnetic Field
• Single-crystal study of the honeycomb XXZ magnet BaCo${}_2$(PO${}_4$)${}_2$ in magnetic fields

Cited by in corpus (4)

• BaCo${}_2$(AsO${}_4$)${}_2$: Strong Kitaev, After All
• Intermediate field-induced phase of the honeycomb magnet BaCo${}_2$(AsO${}_4$)${}_2$
• Bond-dependent interactions and ill-ordered state in the honeycomb cobaltate BaCo${}_2$(AsO${}_4$)${}_2$
• Order-by-disorder from Schwinger bosons in a frustrated honeycomb ferromagnet