Abstract
The general problems of an accurate a priori determination of electronic band structures are discussed. Data for the Γ ΛL line in Ag and Pt will be discussed as a case in point. Various methods have been employed to determine the electron wavevectorK of the direct transitions to the bands accessible to photon energieshv=16.9 eV and 21.2 eV: the disappearance and appearance angle method, the symmetry method, the triangulation method and the gap emission method. It is found that the experimentalE(K) points agree well within ±0.5 eV with a recently ab initio calculated conduction band structure. We further have measured Ag(111) normal emission AREDC's in the photon energy range 11 eV≦hv≦25 eV and have found that the intensity behaviour with photon energy of the direct transitions compares well with calculated bulk momentum matrix elements for Ag along Λ. A summary of the experimentalE(K) data for both the conduction and valence bands in Ag is given and compared with a recent local density calculation. Similar investigations for Pt are presented.
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Dedicated to B. Mühlschlegel on the occasion of his 60th birthday
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Wern, H., Courths, R., Leschik, G. et al. On the band structure of silver and platinum from angle-resolved photoelectron spectroscopy (ARUPS) measurements. Z. Physik B - Condensed Matter 60, 293–310 (1985). https://doi.org/10.1007/BF01304449
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DOI: https://doi.org/10.1007/BF01304449