Zn effect on STM imaging of brass surfaces

Frédéric Wiame, Mazharul M. Islam, Bekir Salgin, Jolanta ͆wiatowska, Dominique Costa, Boubakar Diawara, Vincent Maurice, Philippe Marcus

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The surface of brass has been characterized by combined experimental and theoretical approaches. The experimental scanning tunneling microscopy study performed on a Cu0.7Zn0.3(111) surface at room temperature showed terraces of up to several tens of nanometers in width, separated by monoatomic steps. Depending on the tunneling conditions, a disordered pattern or a sharp atomically-resolved hexagonal lattice was observed. The disordered pattern is attributed to the superposition of Friedel oscillations at the surface induced by the presence of Zn atoms. Comparison of simulated images, based on a simple model of randomly distributed point defects, shows a good agreement with experimental results. At atomic resolution, a chemical contrast has been demonstrated between Zn and Cu atoms at the surface showing the random distribution of isolated Zn atoms into the hexagonal lattice.

Original languageEnglish
Pages (from-to)148-152
Number of pages5
JournalSurface Science
Volume644
Early online date24 Oct 2015
DOIs
Publication statusPublished - 1 Feb 2016

Keywords

  • Chemical contrast
  • Density functional theory
  • Friedel oscillations
  • Scanning tunneling microscopy
  • Surface local density of states

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Zn effect on STM imaging of brass surfaces'. Together they form a unique fingerprint.

Cite this