Observation of the screened potential and the Friedel oscillation by low-temperature scanning tunneling microscopy/spectroscopy

Masanori Ono, Takahiro Nishio, Toshu An, Toyoaki Eguchi, Yukio Hasegawa

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Using low-temperature scanning tunneling microscopy/spectroscopy we have developed a method for measuring electrostatic potential in high spatial and energy resolutions, and performed a real-space observation of the potential screened by two-dimensional surface electrons around step edges, where extra charges are localized, on the Si(1 1 1)√3 × √3-Ag surface. In the potential images, characteristic decay and the Friedel oscillation were clearly observed around the charges.

Original languageEnglish
Pages (from-to)469-474
Number of pages6
JournalApplied Surface Science
Volume256
Issue number2
DOIs
Publication statusPublished - 2009 Oct 30
Externally publishedYes

Keywords

  • Electron standing waves
  • Scanning tunneling microscopy
  • Scanning tunneling spectroscopy
  • Screening
  • The Friedel oscillation
  • Two-dimensional electron system

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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