Real-space observation of screened potential and friedel oscillation by scanning tunneling spectroscopy

Y. Hasegawa, M. Ono, Y. Nishigata, T. Nishio, T. Eguchi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Using scanning tunneling spectroscopy at 5K electrostatic potential profile on the Si(111) 3x 3 Ag surface has been obtained with high spatial and energy resolutions. The potential profile measured around a step edge was explained with the Coulomb potential screened by a two-dimensional electron system which intrinsically exists on the surface. Friedel oscillation, which is characteristic to the screening, was also observed in the potential images. Its shape and phase were discussed in comparison with those of standing waves.

Original languageEnglish
Article number080
Pages (from-to)399-403
Number of pages5
JournalJournal of Physics: Conference Series
Volume61
Issue number1
DOIs
Publication statusPublished - 2007 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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