Design of magnetic topological phases in a van der Waals heterostructures
ORAL
Abstract
The recent observation of antiferromagnetic topological insulators (AFTIs) provides a promising platform for understanding the interplay between the band topology and magnetic order. Despite this, magnetic topological phases in strongly interacting systems remain largely unexplored. Here, we design a tight-binding model of a van der Waals (vdWs) heterostructure composed of two-dimensional magnets with intrinsic AFM ordering separated by spacer layers, which hosts magnetic symmetry-protected topological phases. We propose a solid-state realization of this model by designing a vdW heterostructure comprised of a 2D magnet monolayer and transition-metal dichalcogenide space layer. Using first-principles calculations, we study the influence of inter-layer coupling, strain and correlations on the magnetic and topological features.
*This work was funded by the US Department of Energy, Office of Science, National Quantum Information Science Research Centers, Quantum Systems Accelerator (QSA). Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the US Department of Energy under Contract No. DE-AC02- 05CH11231. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a US Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231.
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Presenters
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Ilyoun Na
- University of California, Berkeley