Atomically thin sheets of graphite are metal-like conductors — until they react with hydrogen, when they become insulators. This curious effect could be an excellent model for studying metal–insulator transitions.
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Fuhrer, M., Adam, S. Carbon conductor corrupted. Nature 458, 38–39 (2009). https://doi.org/10.1038/458038a
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DOI: https://doi.org/10.1038/458038a
