Temperature and adsorbate dependence of the image-potential states on Cu(100)

Z. Wu, B. Quiniou, J. Wang, R. M. Osgood

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10 Scopus citations


We report a systematic study of the dependence of image-potential states on surface temperature and oxygen adsorption on Cu(100) using two-photon photoemission spectroscopy. The binding energy of the n=1 image-potential state is found to be insensitive to temperature, in agreement with inverse-photoemission measurements. In the temperature range 300 963 K, the image-peak amplitude is found to have a weak temperature dependence. The exposure of Cu(100) to oxygen (1.5×10-6 Torr s) reduces the intensity of the image-potential peak and causes a shift of the position of this peak toward higher kinetic energy by an amount comparable to the change in the work function. A technique is described for eliminating space-charge effects, which can be a problem in pulsed-laser two-photon measurements.

Original languageEnglish (US)
Pages (from-to)9406-9409
Number of pages4
JournalPhysical Review B
Issue number16
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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