Through carefully controlled deposition of graphene on hexagonal boron nitride, an experimental system is created with which to probe the quantum physics of electrons in two dimensions — allowing experimental access to the elusive 'Hofstadter butterfly'.
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Weiss, D. The butterfly emerges. Nature Phys 9, 395–396 (2013). https://doi.org/10.1038/nphys2680
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DOI: https://doi.org/10.1038/nphys2680
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