Tunneling current change of graphite surface by single ion irradiation

H. Ogiso, W. Mizutani, S. Nakano, H. Tokumoto, K. Yamanaka

Research output: Contribution to journalConference articlepeer-review


We discuss changes in electronic structure and the topography of a graphite surface undergoing by a single ion impact. Protrusion-like regions (PLRs) found in a scanning tunneling microscope image disappeared in the same view of a noncontact atomic force microscope image. We measured tunneling current versus voltage characteristics to determine the density-of-states change in PLRs. We found that the density of states at the Fermi level of PLRs was greater than that of the intact surface. We therefore concluded that the PLRs were not actual topographical changes, but originated from electronic structural changes in semimetal to metal transition.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 1996 Jan 1
EventProceedings of the 1996 MRS Fall Meeting - Boston, MA, USA
Duration: 1996 Dec 21996 Dec 6

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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