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- W4367190460 abstract "The $S=3/2$ Kitaev honeycomb model (KHM) is unique among the spin-$S$ Kitaev models due to a massive ground state quasi-degeneracy that hampered previous numerical and analytical studies. In a recent work~cite{jin2022unveiling}, we showed how an SO(6) Majorana parton mean-field theory of the $S=3/2$ isotropic KHM explains the anomalous features of this Kitaev spin liquid (KSL) in terms of an emergent low-energy Majorana flat band. Away from the isotropic limit, the $S=3/2$ KSL generally displays a quadrupolar order with gapped or gapless Majorana excitations, features that were quantitatively confirmed by DMRG simulations. In this paper, we explore the connection between the $S = 3/2$ KHM with Kugel-Khomskii models and discover new exactly soluble examples for the latter. We perform a symmetry analysis for the variational parton mean-field emph{Ans{a}tze} in the spin and orbital basis for different quantum liquid phases of the $S=3/2$ KHM. Finally, we investigate a proposed time-reversal symmetry breaking spin liquid induced by a {[}111{]} single ion anisotropy and elucidate its topological properties as well as experimental signatures, e.g. an unquantized thermal Hall response." @default.
- W4367190460 created "2023-04-28" @default.
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- W4367190460 date "2023-04-26" @default.
- W4367190460 modified "2023-10-17" @default.
- W4367190460 title "Quantum liquids of the S=3/2 Kitaev honeycomb and related Kugel-Khomskii models" @default.
- W4367190460 doi "https://doi.org/10.48550/arxiv.2304.13378" @default.
- W4367190460 hasPublicationYear "2023" @default.
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