Bilayer Haldane model: From trivial band insulator to fractionalized quantum anomalous Hall insulator
arXiv:1804.01996 · doi:10.1103/PhysRevB.98.125145
Abstract
Motivated by work on the bulk topological proximity effect and the topological bootstrap, we consider two coupled layers of quantum anomalous Hall (QAH) insulators with opposite signs of time-reversal breaking, which leads to a trivial band insulator at half-filling. We study the impact of interactions in this model within slave rotor theory, which leads to a layer-selective Mott transition, resulting in a fractionalized quantum anomalous Hall insulator QAH where a Chern band insulator coexists with a chiral spin liquid. We also compute the edge electron spectral function in the vicinity of the QAH phase.
arXiv comment11 pages, 8 figures
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Cited by in corpus (7)
- Topological proximity effects in a Haldane-graphene bilayer system
- Bulk topological proximity effect in multilayer systems
- Bilayer Haldane system: Topological characterization and adiabatic passages connecting Chern phases
- Band engineered bilayer Haldane model: Evidence of multiple topological phase transitions
- Chiral spin liquid phase in an optical lattice at mean-field level
- Emergence of Spinon Fermi Arcs in the Weyl-Mott Metal-Insulator Transition
- Topological phases of monolayer and bilayer depleted Lieb lattices