Share Email Print
cover

Proceedings Paper

Scanning tunneling microscopy of adsorbed molecules: theoretical considerations
Author(s): Fabio Biscarini; Carlos J. Bustamante; Vasudev M. Kenkre
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The interpretation of scanning tunneling microscopy (STM) images of adsorbed molecules requires a redefinition of the current, that goes beyond the limitations imposed by the Transfer Hamiltonian formalism. Here we discuss two expressions for the tunneling current we derived, both suitable for situations in which an adsorbate is placed between tip and substrate. The former is still based on a perturbative approach, but emphasizes the contributions to the STM current due to the adsorbate. The latter is an exact expression obtained by treating the STM current like an electron transport process. This allows the inclusion of both the quantum aspects of the transport and thermal effects, and it can be used in widely different situations.

Paper Details

Date Published: 1 May 1992
PDF: 7 pages
Proc. SPIE 1639, Scanning Probe Microscopies, (1 May 1992); doi: 10.1117/12.58179
Show Author Affiliations
Fabio Biscarini, Univ. of Oregon (United States)
Carlos J. Bustamante, Univ. of Oregon (United States)
Vasudev M. Kenkre, Univ. of New Mexico (United States)


Published in SPIE Proceedings Vol. 1639:
Scanning Probe Microscopies
Srinivas Manne, Editor(s)

© SPIE. Terms of Use
Back to Top