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Transport anomaly at the ordering transition for adatoms on graphene
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cond-mat.dis-nncond-mat.stat-mech
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adatomsgrapheneorderingresistivitytransitionanalyzeanomalycritical
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We analyze a manifestation of the partial ordering transition of adatoms on graphene in resistivity measurements. We find that Kekule mosaic ordering of adatoms increases sheet resistance of graphene, due to a gap opening in its spectrum, and that critical fluctuations of the order parameter lead to a non-monotonic temperature dependence of resistivity, with a cusp-like minimum at T=T_c.
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