Abstract
The linewidths (inverse lifetimes) Γe-e of Be(0001) and Mg(0001) surface electronic states are calculated as the projection of the imaginary part of the self-energy operator of a quasiparticle onto the state. The screened Coulomb interaction is calculated using a model potential, which takes into account the energy gap in the band structure and a surface state located in this gap. The wave functions and energies of electron states are calculated by a self-consistent film pseudopotential method. It is shown that Γe-e essentially depends on the position of the surface state in the Brillouin zone. The difference between the calculated values of Γe-e and those obtained in a homogeneous electron gas model is shown to be basically due to transitions from surface bands.
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Translated from Fizika Tverdogo Tela, Vol. 42, No. 7, 2000, pp. 1334–1340.
Original Russian Text Copyright © 2000 by Silkin, Chulkov.
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Silkin, V.M., Chulkov, E.V. The linewidth of surface states of simple metals. Phys. Solid State 42, 1373–1379 (2000). https://doi.org/10.1134/1.1131395
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DOI: https://doi.org/10.1134/1.1131395