IBM Journal of Research and Development
IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
Journal of Research
and Development
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Search/Index  
    Orders  
    Description  
    Patents  
    Recent publications  
    Author's Guide  
  Staff  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 30, Number 5, Page 455 (1986)
Scanning Tunneling Microscopy II
  Full article: arrowPDF   arrowCopyright info





   

Properties of vacuum tunneling currents: Anomalous barrier heights

by J. H. Coombs, J. B. Pethica
A design of STM which does not use vacuum internal vibration isolation and may be cooled to liquid helium temperatures is described. Tunneling current characteristics underlying STM operations are discussed. A model is presented to explain the anomalously low (<1 eV) tunneling barrier heights often observed. On the basis of this model we suggest criteria for obtaining reliable STM images.
Related Subjects: Physics, solid state; Quantum theory and effects; Scanning tunneling microscopy; Surface science