Observation of large-scale features on graphite by scanning tunnelling microscopy

Wing Tat Pong, James Bendall, Colm Durkan

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Superlattice structures and rippling fringes were imaged on two separate pieces of graphite (HOPG) by scanning tunnelling microscopy (STM). We observed the corrugation conservation phenomenon on one of the superlattice structures where an overlayer does not attenuate the corrugation amplitude of the superlattice. Such a phenomenon may illustrate an implication that nanoscale defects a few layers underneath the surface may propagate through many layers without decay and form the superlattice structure on the topmost surface. Some rippling fringes with periodicities of 20 nm and 30 nm and corrugations of 0.1 nm and 0.15nm were observed in the superlattice area and in nearby regions. Such fringes are believed to be due to physical buckling of the surface. The stress required to generate such structures is estimated, and a possible cause is discussed. An equation relating the attenuation factor to the number of overlayers is proposed.

Original languageEnglish (US)
Pages (from-to)5443-5446
Number of pages4
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume44
Issue number7 B
DOIs
StatePublished - Jul 26 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy

Keywords

  • Attenuation factor
  • Corrugation conservation
  • Graphite
  • Moiré rotation pattern
  • Rippling fringes
  • Scanning tunnelling microscope
  • Superlattice

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