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ABSTRACT:
SUBMITTER: Barrier J
PROVIDER: S-EPMC7666116 | biostudies-literature | 2020 Nov
REPOSITORIES: biostudies-literature
Nature communications 20201113 1
In quantizing magnetic fields, graphene superlattices exhibit a complex fractal spectrum often referred to as the Hofstadter butterfly. It can be viewed as a collection of Landau levels that arise from quantization of Brown-Zak minibands recurring at rational (p/q) fractions of the magnetic flux quantum per superlattice unit cell. Here we show that, in graphene-on-boron-nitride superlattices, Brown-Zak fermions can exhibit mobilities above 10<sup>6</sup> cm<sup>2</sup> V<sup>-1</sup> s<sup>-1</s ...[more]