石墨烯表面吸附原子有序跃迁的输运反常
Transport anomaly at the ordering transition for adatoms on graphene
摘要：
我们分析了在电阻率测量中石墨烯上吸附原子的部分有序转变的表现形式。我们发现，由于吸附原子的Kekule镶嵌有序，石墨烯的薄层电阻增加，这是由于其光谱中的能隙开放，并且序参量的临界波动导致电阻率的非单调温度依赖性，在T = Tc处具有尖点状最小值。
英文摘要：
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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