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Topological and magnetic phases with strong spin-orbit coupling on the hyperhoneycomb lattice

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Title
Topological and magnetic phases with strong spin-orbit coupling on the hyperhoneycomb lattice
Author(s)
Eric Kin-Ho Lee; Bhattacharjee S.; Kyusung Hwang; Heung-Sik Kim; Hosub Jin; Yong Baek Kim
Publication Date
2014-05
Journal
PHYSICAL REVIEW B, v.89, no.20, pp.205132
Publisher
AMER PHYSICAL SOC
Abstract
We study the general phase diagram of correlated electrons for iridium-based (Ir) compounds on the hyperhoneycomb lattice, a crystal structure where the Ir4+ ions form a three-dimensional network with threefold coordination recently realized in the Î-Li2IrO3 compound. Using a combination of microscopic derivations, symmetry analysis, and density functional calculations, we determine the general model for the electrons occupying the jeff=12 orbitals at the Ir4+ sites. In the noninteracting limit, we find that this model allows for both topological and trivial electronic band insulators along with metallic states. The effect of Hubbard-type electron-electron repulsion on the above electronic structure in stabilizing q=0 magnetic order reveals a phase diagram with continuous phase transition between a topological band insulator and a Néel ordered magnetic insulator. © 2014 American Physical Society.
URI
https://pr.ibs.re.kr/handle/8788114/1037
DOI
10.1103/PhysRevB.89.205132
ISSN
2469-9950
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > 1. Journal Papers (저널논문)
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