CUED Publications database

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

Pong, WT and Bendall, J and Durkan, C (2005) Observation of large-scale features on graphite by scanning tunnelling microscopy. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 44. pp. 5443-5446. ISSN 0021-4922

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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. © 2005 The Japan Society of Applied Physics.

Item Type: Article
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:38
Last Modified: 22 May 2018 07:55