Simple model of electronic density of states of graphite and its application to the investigation of superlattices

Wing Tat Pong, Colm Durkan

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

A model of graphite which is easy to comprehend and simple to implement for the simulation of scanning tunneling microscopy (STM) images is described. This model simulates the atomic density of graphite layers, which in turn correlates with the local density of states. The mechanism and construction of such a model is explained with all the necessary details which have not been explicitly reported before. This model is applied to the investigation of rippling fringes which have been experimentally observed on a superlattice, and it is found that the rippling fringes are not related to the superlattice itself. A superlattice with abnormal topmost layers interaction is simulated, and the result affirms the validity of the moiré rotation pattern assumption. The "odd-even" transition along the atomic rows of a superlattice is simulated, and the simulation result shows that when there is more than one rotated layer at the top, the "odd-even" transition will not be manifest.

Original languageEnglish (US)
Pages (from-to)5365-5369
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number7 B
DOIs
StatePublished - Jul 26 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy

Keywords

  • Graphite
  • Moiré rotation pattern
  • Odd even transition
  • Rippling fringes
  • Superlattice

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