AVS 47th International Symposium
    Processing at the Nanoscale/NANO 6 Wednesday Sessions
       Session NS+NANO6+MC-WeM

Paper NS+NANO6+MC-WeM1
Surface Acoustic Wave Investigation by UHV Scanning Tunneling Microscopy

Wednesday, October 4, 2000, 8:20 am, Room 302

Session: Nanomechanical and Interface Measurements
Presenter: P.U. Voigt, Paul-Drude-Institut für Festkörperelektronik, Germany
Authors: P.U. Voigt, Paul-Drude-Institut für Festkörperelektronik, Germany
S. Krauß, Paul-Drude-Institut für Festkörperelektronik, Germany
E. Chilla, Paul-Drude-Institut für Festkörperelektronik, Germany
R. Koch, Paul-Drude-Institut für Festkörperelektronik, Germany
Correspondent: Click to Email
Recently we have shown that the scanning tunneling microscope can also be used to investigate surface acoustic waves (SAW) of 35 MHz by adding a high frequency sinusoidal signal to the dc tip voltage.@footnote 1@ Due to mixing with the SAW oscillation at the tunneling gap the tunneling current contains both amplitude and phase information of the SAW. Here we report on the first UHV compatible version of this technique including provisions for sample transfer and in situ surface preparation. Since both signal-to-noise ratio and spacial resolution are significantly enhanced, the acoustic oscillation of single atoms and monoatomic steps can be investigated. At present SAW frequencies up to 500 MHz have been successfully fed into the UHV system. @FootnoteText@ @footnote 1@ E. Chilla, W. Rohrbeck, H.-J. Fröhlich, R. Koch, K. H. Rieder, Appl. Phys. Lett.61, 3107 (1992) .