Lifetimes of Shockley electrons and holes at the Cu(111) surface

Details Lifetimes of Shockley electrons and holes at the Cu(111) surface Lifetimes of Shockley electrons and holes at the Cu(111) surface

2005-09-27

arxiv.org/abs/cond-mat/0509683v1

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.

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