Intensity and line-shape measurements in inelastic electron tunneling spectroscopy
- 1 November 1978
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 49 (11) , 5571-5575
- https://doi.org/10.1063/1.324478
Abstract
Two techniques for removing the background in inelastic electron tunneling spectroscopy (IETS) have been examined in detail. The first of these uses a polynomial least‐squares routine to fit a smooth curve to the data on either side of the IETS peak, while the second relies on differential inelastic electron tunneling spectroscopy (DIETS) to subtract one spectrum from another in order to remove some unwanted IETS peaks. Both procedures were applied to spectra obtained from Al‐Pb junctions with the lead normal and superconducting. One finds that it is easier to determine the background when the normal rather than superconducting lead is used, as the superconducting line shape has a broad undershoot. The intensity results shown here indicate that failure to consider the undershoot may result in errors as large as 30%. A comparison of theoretical and experimental line shapes is made for data with both normal and superconducting electrodes.This publication has 9 references indexed in Scilit:
- Effect of cover electrode metal on inelastic electron tunneling structureSurface Science, 1977
- Bridge for differential tunneling spectroscopyReview of Scientific Instruments, 1977
- Inelastic electron tunnelingPhysics Reports, 1977
- Vibrational-mode shifts in inelastic electron tunneling spectroscopy: Effects due to superconductivity and surface interactionsPhysical Review B, 1976
- Inelastic Electron Tunneling Spectroscopy: A Review of an Emerging Analytical TechniqueApplied Spectroscopy, 1976
- Application of minicomputers in high resolution electron tunnelingReview of Scientific Instruments, 1975
- Inelastic-Electron-Tunneling Spectroscopy of Metal-Insulator-Metal JunctionsPhysical Review B, 1973
- Inelastic Electron Tunneling in Al-Al-Oxide-Metal SystemsPhysical Review B, 1969
- Molecular Vibration Spectra by Inelastic Electron TunnelingPhysical Review B, 1968