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The effect of a vacancy on the STM image of graphite

Theoretical studies have been done on graphite with a vacancy using the extended Huckel tight‐binding (EHTB) method. The results of the singly‐ and doubly‐layered samples show that there is an unexpected distance dependence of the charge density directly over the vacancy. Furthermore, the vacancy acts as a perturbation to distinguish two sublattices which exist in pristine graphite and it creates a charge enhancement in the atoms directly surrounding it.