Guan, YifeiYazyev, Oleg V.Kruchkov, Alexander2023-07-032023-07-032023-07-032023-05-0310.1021/acs.nanolett.3c00121https://infoscience.epfl.ch/handle/20.500.14299/198707WOS:000985742200001The interplay of topological characteristics in real space and reciprocal space can lead to the emergence of unconventional topological phases. In this Letter, we implement a novel mechanism for generating higher-Chern flat bands on the basis of twisted bilayer graphene (TBG) coupled to topological magnetic structures in the form of the skyrmion lattice. In particular, we discover a scenario for generating vertical bar C vertical bar = 2 dispersionless electronic bands when the skyrmion periodicity and the moire ' periodicity match. Following the Wilczek argument, the statistics of the charge-carrying excitations in this case is bosonic, characterized by electronic charge Q = 2e, which is even in units of electron charge e. The skyrmion coupling strength triggering the topological phase transition is realistic, with its lower bound estimated as 4 meV. The Hofstadter butterfly spectrum results in an unexpected quantum Hall conductance sequence +/- 2e(2)/h, +/- 4e(2)/h, ... for TBG with the skyrmion order.Chemistry, MultidisciplinaryChemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryPhysics, AppliedPhysics, Condensed MatterChemistryScience & Technology - Other TopicsMaterials SciencePhysicstwisted bilayer graphenemoire lattice relaxationskyrmionsflat electronic bandshybrid wannier functionsquantum hall effectbloch electronsdirac fermionsquantumsuperconductivitypolarizationspintext::journal::journal article::research article