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Effects of Environment on Tunneling Spectroscopy of Gold Films

Published online by Cambridge University Press:  21 February 2011

G. C. Wetsel ,
Z. M. Liu ,
T. L. Weng ,
M. W. Gosney  and
R. J. Warmack
G. C. Wetsel
Affiliation:
Department of Physics, Southern Methodist University, Dallas, TX 75275
Z. M. Liu
Affiliation:
Department of Physics, Southern Methodist University, Dallas, TX 75275
T. L. Weng
Affiliation:
Department of Electrical Engineering, Southern Methodist University, Dallas, TX 75275
M. W. Gosney
Affiliation:
Department of Electrical Engineering, Southern Methodist University, Dallas, TX 75275
R. J. Warmack
Affiliation:
Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
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Abstract

A scanning tunneling microscope with a tunneling-current dynamic range of four orders of magnitude has been used in tunneling-spectroscopy studies of Au surfaces in moderate vacuum and in various gases at atmospheric pressure. Rapid scans of z-motion transducer voltage (Vz) were measured as a function of tunneling current (It) under computer control. Driftcorrected plots of log(It) versus Vz were essentially linear. The mean barrier potential was determined from the slope of these plots and the measured displacement-versus-Vzcalibration curve. Barrier potentials so determined are compared for different environmental conditions of the Au surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 139: Symposium R – High Resolution Microscopy of Materials , 1989 , 303
Copyright
Copyright © Materials Research Society 1989

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References

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