Effects of Tip-Broadening and Asymmetry on Scanning Tunneling Microscope Topographs

Abstract

Investigated are broadening and skewing of scanning tunneling microscope topographs caused by tip size and symmetry. Model images were generated numerically by convoluting a gaussian response function for the tip with an idealized graphite image. Atomic-scale features were retained even for a 9.4 A FWHM tip function, which demonstrated that single-atom tips are not required to obtain atomic resolution topographs. Model tips with an elliptical radial cross section produced many of the familiar skewed images of graphite. Such response functions could also be used to remove the skew from an experimental topograph, and thus provide an approximation for the shape of the physical tip. Keywords: Topographs, Numerical imaging, Response functions.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1990
Accession Number
ADA224883

Entities

People

  • Elliot A. Eklund
  • Eric J. Snyder
  • R. Stanley Williams

Organizations

  • University of California, Los Angeles

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Asymmetry
  • Biochemistry
  • California
  • Charge Density
  • Chemistry
  • Classification
  • Geometry
  • Graphitic Materials
  • Microscopes
  • Military Research
  • Security
  • Shape
  • Simulations
  • Two Dimensional
  • United States
  • Universities

Fields of Study

  • Physics

Readers

  • Canine Service Warrior Training Program for Wounded Warriors in the Veterinary Industry, Supported by Donors.
  • Nanoscale Plasmonic Nanotechnology
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.