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Electronic structure and tunneling current for chemisorbed atoms

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1 Author(s)
Norton D. Lang ; IBM Research Division, P.O. Box 218, Yorktown Heights, New York 10598, USA

We discuss the tunneling current density in the vacuum region between two planar metal electrodes, one of which has an atom chemisorbed on its surface. The relation of this current distribution to the electronic structure of the adatom is analyzed. The study of this model problem leads to a better understanding of important aspects of the current flow in the scanning tunneling microscope. The emphasis of this work is not so much on the question of resolution discussed in other theoretical studies as on the characteristic signatures of chemically different atoms.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:30 ,  Issue: 4 )