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Abstract: We report on scanning tunneling microscopy and spectroscopy of grainboundaries in highly oriented pyrolytic graphite. Grain boundaries showed aperiodic structure and an enhanced charge density compared to the bare graphitesurface. Two possible periodic structures have been observed along grainboundaries. A geometrical model producing periodically distributed pointdefects on the basal plane of graphite has been proposed to explain thestructure of grain boundaries. Scanning tunneling spectroscopy on grainboundaries revealed two strong localized states at -0.3 V and 0.4 V.



Author: J. Cervenka, C.F.J. Flipse

Source: https://arxiv.org/







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