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Jin, Hosub
Quantum Materials Design Lab
Research Interests
  • Spin-orbit coupling, electron-correlation, topological quantum phases

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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
Lee, EKBhattacharjee, SHwang, KyusungKim, Heung-SikJin, HosubKim, Yong Baek
Issue Date
2014-05
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.89, no., pp.205132 -
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 beta-Li2IrO3 compound. Using a combination of microscopic derivations, symmetry analysis, and density functional calculations, we determine the general model for the electrons occupying the j(eff) = 1/2 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 Neel ordered magnetic insulator.
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DOI
10.1103/PhysRevB.89.205132
ISSN
2469-9950
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PHY_Journal Papers
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