Models and materials for generalized Kitaev magnetism. (13th November 2017)

• Record Type: Journal Article
• Authors: Winter, Stephen M; Tsirlin, Alexander A; Daghofer, Maria; van den Brink, Jeroen; Singh, Yogesh; Gegenwart, Philipp; Valentí, Roser
• Is Part Of: Journal of physics. Volume 29:Number 49(2017)
• Publication Date: 2017-11-13
• Subjects: hexagonal iridates -- quasi-molecular orbitals -- spin-orbital models -- Kitaev model -- RuCl3; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aa8cf5
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: 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 (Na2 IrO3, α -Li2 IrO3, and α -RuCl3 ), three-dimensional Kitaev materials ( β - and γ -Li2 IrO3 ), and other potential candidates, completing the review with the list of open questions awaiting new insights.