Quantization of electron states in ultrathin xenon layers

Decay of electronic excitations at metal surfaces

“…Similar studies have been reported for the G surface state on Ag (1 1 1) in Ref. [116] showing the substantial influence of Dy on peak widths from rapidly dispersing surface states. The effect of a finite energy resolution can be controlled similarly by an experimental variation of DE.…”

“…the bottom energy of the parabola, also shifts almost linearly with T closer to E F . The latter effect is also observed for the Shockley-states at G on Ag(1 1 1) and Au(1 1 1) and can be traced back quantitatively to the temperature-dependent shift (due to the lattice expansion) of the relevant bulk band gaps which support these surface states [116]. The observed increase in linewidth results from the contribution of G ep , see Eq.…”

“…Trace C was taken at T ¼ 56 K, DE ¼ 21 meV and Dy ¼ AE0:9 also after excitation with ArI radiation [116]. For this peak a careful lineshape analysis resulted in the upper-limit estimate of G h < 20 meV at T ¼ 56 K for the inverse lifetime of the photohole [116]. The recent progress made by Reinert et al [100] is clearly evident in Fig.…”

“…Spectrum B was obtained also at 300 K, but with an improved spectrometer operated at DE ¼ 60 meV, Dy ¼ 1 and ho ¼ 13 eV [124]. Trace C was taken at T ¼ 56 K, DE ¼ 21 meV and Dy ¼ AE0:9 also after excitation with ArI radiation [116]. For this peak a careful lineshape analysis resulted in the upper-limit estimate of G h < 20 meV at T ¼ 56 K for the inverse lifetime of the photohole [116].…”

“…At the (1 1 1) surfaces of noble metals the surface-state band bottom is well separated from bulk states [45,116]. For energies above E F the surface-state band approaches the bulk band edge and enters the bulk continuum (at $0.45 eV for Ag (1 1 1), $1.08 eV for Cu (1 1 1) and $1.20 eV for Au (1 1 1)) losing its surface weight.…”