TITLE

Detection of phonons with a scanning tunneling microscope

AUTHOR(S)
Smith, Douglas P. E.; Binnig, Gerd; Quate, Calvin F.
PUB. DATE
December 1986
SOURCE
Applied Physics Letters;12/15/1986, Vol. 49 Issue 24, p1641
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A well defined spectrum of peaks in d2I/dV2 vs V has been obtained with a tunneling microscope immersed in liquid helium. The positions of the peaks correspond closely to the energies of the phonons of the graphite sample and the tungsten tip. We propose that electrons coupling to the bulk phonons near the tip to sample gap cause the observed increases in the tunneling conductance. Spectroscopic imaging at a phonon energy shows spatial variations of the vibrational spectra on an atomic scale.
ACCESSION #
9821678

 

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