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- W2044894692 abstract "Angle-resolved photoemission spectra are reported for Au (111) and Pt (111) in the photon-energy range $6ensuremath{le}hensuremath{nu}ensuremath{le}33$ eV. Experimental dispersion relations along $ensuremath{Lambda}$ were derived for both crystals; comparison with relativistic augmented-plane-wave calculations showed generally good qualitative agreement, but quantitative disagreement of the order of a few tenths of an eV. Band energies are tabulated; values at $ensuremath{Gamma}$ are ${ensuremath{Gamma}}_{8}=3.55, 5.90$, ${ensuremath{Gamma}}_{7}=4.45$ eV for Au; ${ensuremath{Gamma}}_{8}=1.40, 4.07$, ${ensuremath{Gamma}}_{7}=2.80$ eV for Pt. The $s$ band is found to be ca. 1 eV (Pt) and 0.5 eV (Au) less bound than the theoretical prediction. Ligand field parameters at $ensuremath{Gamma}$ are presented for both samples: $ensuremath{xi}(5d)=0.71ifmmodepmelsetextpmfi{}0.05$ eV, $10Dq=1.22ifmmodepmelsetextpmfi{}0.05$ eV for Au; $ensuremath{xi}(5d)=0.66ifmmodepmelsetextpmfi{}0.05$ eV, $10Dq=1.78ifmmodepmelsetextpmfi{}0.05$ eV for Pt. The systematics of $10Dq$ in the noble metals is discussed. The polarization dependence of the spectra was used to assign initial-state symmetries empirically: bands 3, 5 show ${ensuremath{Lambda}}_{6}$ symmetry, bands 2, 4, 6, ${ensuremath{Lambda}}_{4}+{ensuremath{Lambda}}_{5}$. Cooling of the Au crystal showed that the $sensuremath{-}p$ plateau is due to a thermally insensitive indirect process, and that both thermal diffuse scattering and phonon-assisted inelastic processes contribute to the loss of spectral contrast at room temperature. Resonances in intensity with photon energy were investigated and assigned in terms of the final-state band structure." @default.
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- W2044894692 title "Angle-resolved photoemission determination of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>Λ</mml:mi></mml:math>-line valence bands in Pt and Au using synchrotron radiation" @default.
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