Physics – Condensed Matter – Materials Science
Scientific paper
2005-09-27
Physics
Condensed Matter
Materials Science
4 pages, 3 figures, to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.72.193401
A theoretical many-body analysis is presented of the electron-electron inelastic lifetimes of Shockley electrons and holes at the (111) surface of Cu. For a description of the decay of Shockley states both below and above the Fermi level, single-particle wave functions have been obtained by solving the Schr\"odinger equation with the use of an approximate one-dimensional pseudopotential fitted to reproduce the correct bulk energy bands and surface-state dispersion. A comparison with previous calculations and experiment indicates that inelastic lifetimes are very sensitive to the actual shape of the surface-state single-particle orbitals beyond the $\bar\Gamma$ (${\bf k}_\parallel=0$) point, which controls the coupling between the Shockley electrons and holes.
Crampin Staurt
Pitarke J. M.
Vergniory M. G.
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