Artificial moiré engineering for an ideal BHZ model

2024/09/13 by Wangqian Miao, Miao, Wangqian, Arman Rashidi +3 · 2 citations
Mathematics · Physics and Astronomy · #Numerical methods for differential equations #Model Reduction and Neural Networks

paper · pdf · doi:10.48550/arxiv.2409.08540

Abstract

We demonstrate that (001) grown Cd3As2 thin films with a superlattice-patterned gate can potentially realize the moiré Bernevig-Hughes-Zhang (BHZ) model. Our calculations identify the parameterization region necessary to achieve topological flat mini-bands with a C4z symmetric and a C6z symmetric potential. Additionally, we show that a spin-polarized state can serve as the minimal platform for hosting the moiré induced quantum anomalous Hall effect, supported by Hartree Fock interaction kernel analysis and self-consistent mean field calculations.

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