Abstract
We have imaged for the first time individual atoms and small clusters of metal species on a metal substrate at room temperature by means of a scanning tunneling microscope (STM) operated under ultrahigh vacuum conditions. The system we have studied is Fe on W(110), for which a carbon-induced (15×3)-reconstruction of the W(110) substrate has been found to prevent surface diffusion of Fe atoms at 300 K. Upon positioning the STM-tip above individual Fe adsorbates, local tunneling spectra could be obtained. A pronounced empty-state peak at 0.5 eV above the Fermi level has been found, characteristic for individual Fe adsorbates. This peak can serve as a fingerprint for the identification of Fe adsorbate species.
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Bode, M., Pascal, R., Wiesendanger, R.: to be published
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Crommie, M.F., Lutz, C.P., Eigler, D.M., Phys. Rev. B48, 2851 (1993)
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Bode, M., Pascal, R. & Wiesendanger, R. Imaging and tunneling spectroscopy of individual iron adsorbates at room temperature. Z. Phys. B - Condensed Matter 99, 143–144 (1995). https://doi.org/10.1007/BF02769925
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DOI: https://doi.org/10.1007/BF02769925