Modification of electron density in surface states: Standing wave observation on Pd overlayers by STM

Y. Hasegawa, Takayuki Suzuki, T. Sakurai

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Our recent attempts for modifying electron density in the surface states of Au(1 1 1) and Cu(1 1 1) surfaces are presented. Using a low-temperature scanning tunneling microscopy electronic standing wave patterns are observed on monolayer-high Pd layer deposited on those surfaces. Longer wave length of the oscillatory structure on the Pd layer than that of the substrates indicates upward shift of an energy level of the surface states and reduced electron density in the states on the overlayer. The observed energy level variation is explained with the phase shift analysis.

Original languageEnglish
Pages (from-to)84-88
Number of pages5
JournalSurface Science
Volume514
Issue number1-3
DOIs
Publication statusPublished - 2002 Aug 10
Externally publishedYes

Keywords

  • Copper
  • Gold
  • Metallic films
  • Palladium
  • Scanning tunneling microscopy
  • Surface electronic phenomena (work function, surface potential, surface states, etc.)
  • Surface waves

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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