Ordered states in the Kitaev-Heisenberg model: From 1D chains to 2D honeycomb
dc.bibliographicCitation.journalTitle | Scientific Reports | eng |
dc.bibliographicCitation.volume | 8 | eng |
dc.contributor.author | Agrapidis, Cliò Efthimia | |
dc.contributor.author | van den Brink, Jeroen | |
dc.contributor.author | Nishimoto, Satoshi | |
dc.date.accessioned | 2018-07-14T02:39:13Z | |
dc.date.available | 2019-06-28T07:31:11Z | |
dc.date.issued | 2018 | |
dc.description.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 = cosϕ) and Kitaev (K = sinϕ) interactions. Depending on the ratio, the system exhibits four long-range ordered states: ferromagnetic-z, ferromagnetic-xy, staggered-xy, Néel-z, and two liquid states: Tomonaga-Luttinger liquid and spiral-xy. The two Kitaev points ϕ=π2 and φ=3π2 are singular. The ϕ-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 RuCl3, 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. | eng |
dc.description.fonds | Leibniz_Fonds | |
dc.description.version | publishedVersion | eng |
dc.format | application/pdf | |
dc.identifier.uri | https://doi.org/10.34657/4715 | |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/1419 | |
dc.language.iso | eng | eng |
dc.publisher | London : Nature Publishing Group | eng |
dc.relation.doi | https://doi.org/10.1038/s41598-018-19960-4 | |
dc.rights.license | CC BY 4.0 Unported | eng |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | eng |
dc.subject.ddc | 620 | eng |
dc.subject.other | Magnetic properties and materials | eng |
dc.subject.other | Phase transitions and critical phenomena | eng |
dc.title | Ordered states in the Kitaev-Heisenberg model: From 1D chains to 2D honeycomb | eng |
dc.type | Article | eng |
dc.type | Text | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | IFWD | eng |
wgl.subject | Ingenieurwissenschaften | eng |
wgl.type | Zeitschriftenartikel | eng |
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