Multiple Chern Bands in Twisted MoTe 2 and Possible Non-Abelian States

作者：Cheng Xu, Ning Mao, Tian-Sheng Zeng, Yang Zhang · 发表于：Physical Review Letters · 年份：2025 · DOI：10.1103/physrevlett.134.066601 · 被引用次数：41 · 研究领域：Topological Materials and Phenomena、Quantum and electron transport phenomena、2D Materials and Applications

We investigate the moiré band structures and a possible even-denominator fractional quantum Hall state in small angle twisted bilayer MoTe_{2}, using combined large-scale local basis density functional theory calculation and continuum model exact diagonalization. Via large-scale first-principles calculations at θ=1.89°, we find a sequence of C=1 (Chern number in the K valley) moiré Chern bands in analogy to Landau levels. By constructing the continuum model with multiple Chern bands, we undertake a band-projected exact diagonalization using an unscreened Coulomb repulsion to identify possible non-Abelian states near twist angle θ=1.89° at the half filling of second moiré band.