Models and materials for generalized Kitaev magnetism Article Swipe

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Stephen M. Winter , Alexander A. Tsirlin , Maria Daghofer , Jeroen van den Brink , Yogesh Singh , P. Gegenwart , Roser Valentí ·

YOU? · · 2017 · Open Access · · DOI: https://doi.org/10.1088/1361-648x/aa8cf5 · OA: W2631568866

The exactly solvable Kitaev model on the honeycomb lattice has recently received enormous attention linked to the hope of achieving novel spin-liquid states with fractionalized Majorana-like excitations. In this review, we analyze the mechanism proposed by Jackeli and Khaliullin to identify Kitaev materials based on spin-orbital dependent bond interactions and provide a comprehensive overview of its implications in real materials. We set the focus on experimental results and current theoretical understanding of planar honeycomb systems (Na₂IrO₃, α-Li₂IrO₃, and α-RuCl₃), three-dimensional Kitaev materials (β- and γ-Li₂IrO₃), and other potential candidates, completing the review with the list of open questions awaiting new insights.