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- W3037929478 abstract "We study quantum phase transitions in graphene superlattices in external magnetic fields, where a framework is presented to classify multiflavor Dirac fermion critical points describing hopping-tuned topological phase transitions of integer and fractional Hofstadter–Chern insulators. We argue and provide numerical support for the existence of transitions that can be explained by a nontrivial interplay of Chern bands and van Hove singularities near charge neutrality. This work provides a route to critical phenomena beyond conventional quantum Hall plateau transitions.Received 2 July 2020Accepted 21 October 2020DOI:https://doi.org/10.1103/PhysRevLett.125.236805© 2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasChern insulatorsQuantum Hall effectTopological phase transitionTopological phases of matterPhysical SystemsGrapheneSuperlatticesCondensed Matter & Materials Physics" @default.
- W3037929478 created "2020-07-02" @default.
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- W3037929478 date "2020-12-02" @default.
- W3037929478 modified "2023-10-18" @default.
- W3037929478 title "Classification of Topological Phase Transitions and van Hove Singularity Steering Mechanism in Graphene Superlattices" @default.
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- W3037929478 doi "https://doi.org/10.1103/physrevlett.125.236805" @default.
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