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キーワード:
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要旨:
Photoelectron diffraction has been utilized to confirm the theoretical prediction that the surface core level shifts observed for Be(101̅0) have been improperly assigned. The original assignment based upon the relative intensity of the shifted components was intuitively obvious: the peak with the largest shift of −0.7eV with respect to the bulk was associated with the surface plane, the next peak shifted by −0.5eV stems from the second layer, and the third peak at −0.22eV from the third and fourth layers. First-principles theory and our experimental data show that the largest shift is associated with the second plane, not the first plane.
