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- W4295066751 abstract "We study the energy spectrum of moiré systems under a uniform magnetic field. The superlattice potential generally broadens Landau levels into Chern bands with finite bandwidth. However, we find that these Chern bands become flat at a discrete set of magnetic fields which we dub magic zeros. The flat band subspace is generally different from the Landau level subspace in the absence of the moiré superlattice. By developing a semiclassical quantization method and taking account of superlattice induced Bragg reflection, we prove that magic zeros arise from the simultaneous quantization of two distinct k-space orbits. For instance, we show the chiral model of TBG has flat bands at special fields for any twist angle in the nth Landau level for |n|>1. The flat bands at magic zeros provide a new setting for exploring crystalline fractional quantum Hall physics." @default.
- W4295066751 created "2022-09-10" @default.
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- W4295066751 date "2022-09-09" @default.
- W4295066751 modified "2023-10-14" @default.
- W4295066751 title "Moiré Landau Fans and Magic Zeros" @default.
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- W4295066751 doi "https://doi.org/10.1103/physrevlett.129.116804" @default.
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