Bulk topological proximity effect in multilayer systems

Abstract

We investigate the bulk topological proximity effect in multilayer hexagonal lattice systems by which one can introduce topological properties into a system composed of multiple trivial layers by tunnel coupling to a single nontrivial layer described by the Haldane model. This phenomenon depends not only on the number of layers but also on their arrangement, which can lead to the emergence of dark states in multilayer systems. The response of a trivial system to the proximity of a topological insulator appears to be highly nonlocal, in contrast to the proximity effect observed in context of superconductivity. Furthermore, for a wide range of parameters our system is semimetallic with multiple Dirac points emerging in the Brillouin zone.

arXiv commentMain text: 4 pages, 2 figures. Supplemental material: 4 pages, 2 figures

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Cited by in corpus (4)

• A dark state of Chern bands: Designing flat bands with higher Chern number
• Bilayer Haldane system: Topological characterization and adiabatic passages connecting Chern phases
• Band engineered bilayer Haldane model: Evidence of multiple topological phase transitions
• Symmetry-protected topological wire in a topological vacuum