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We report in this paper the effect of adatoms and structural vibrations on temperature-induced phase transitions of surfaces at elevated temperatures. In the case of Si(100) surface, a temperature-induced metallization takes place at about 600 K without any change in low energy electron diffraction pattern. Photoemission spectroscopy reveals that the metallization is not related to the (instantaneous)...
We report why Na adsorption on the Si(100) surface leads to satellites in photoemission spectra at room temperature. Adsorbate-related peaks, Na2p and NaLVV, lose their kinetic energy by about 2.0 eV, while a satellite is found at a loss energy of about 3.0 eV. In contrast to previous reports, we ascribe the loss structures as being due to atom-selective interband transitions. The satellites are suggested...
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