On the imaging mechanism of monatomic steps in graphite

F. Atamny, T. F. Fässler, A. Baiker, R. Schlögl

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The shape and the atomic arrangement of monolayer steps of graphite have been characterized by STM. The origin of the appearance of the imaged features along the steps is discussed, addressing for the first time both morphological and electronic considerations. Extended Hueckel theoretical calculations of nanotubes are used to identify the contribution of the electronic structure to the STM image of monolayer steps. We show that mechanical tip-sample interactions dominate the imaging process of graphite, leading to step deformation during scanning and negative STM contrast of the atom positions in the hexagonal unit cell.

Original languageEnglish
Pages (from-to)441-447
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Volume71
Issue number4
DOIs
StatePublished - Oct 2000
Externally publishedYes

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