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• W3104482921 abstract "We study the ground state of the 1D Kitaev-Heisenberg (KH) model using the density-matrix renormalization group and Lanczos exact diagonalization methods. We obtain a rich ground-state phase diagram as a function of the ratio between Heisenberg ($J=cosphi)$ and Kitaev ($K=sinphi$) interactions. Depending on the ratio, the system exhibits four long-range ordered states: ferromagnetic-$z$ , ferromagnetic-$xy$, staggered-$xy$, N'eel-$z$, and two liquid states: Tomonaga-Luttinger liquid and spiral-$xy$. The two Kitaev points $phi=frac{pi}{2}$ and $phi=frac{3pi}{2}$ are singular. The $phi$-dependent phase diagram is similar to that for the 2D honeycomb-lattice KH model. Remarkably, all the ordered states of the honeycomb-lattice KH model can be interpreted in terms of the coupled KH chains. We also discuss the magnetic structure of the K-intercalated RuCl$_3$, a potential Kitaev material, in the framework of the 1D KH model. Furthermore, we demonstrate that the low-lying excitations of the 1D KH Hamiltonian can be explained within the combination of the known six-vertex model and spin-wave theory." @default.
• W3104482921 created "2020-11-23" @default.
• W3104482921 creator A5042216140 @default.
• W3104482921 creator A5081481883 @default.
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• W3104482921 date "2018-01-29" @default.
• W3104482921 modified "2023-10-13" @default.
• W3104482921 title "Ordered states in the Kitaev-Heisenberg model: From 1D chains to 2D honeycomb" @default.
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• W3104482921 doi "https://doi.org/10.1038/s41598-018-19960-4" @default.
• W3104482921 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5789058" @default.
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• W3104482921 hasPublicationYear "2018" @default.
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