Self-energy of image states on copper surfaces

Details Self-energy of image states on copper surfaces Self-energy of image states on copper surfaces

1999-08-31

arxiv.org/abs/cond-mat/9908479v1

Phys. Rev. B 60, 11795 (1999)

Physics

Condensed Matter

Materials Science

8 pages, 5 figures, to appear in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.60.11795

We report extensive calculations of the imaginary part of the electron self-energy in the vicinity of the (100) and (111) surfaces of Cu. The quasiparticle self-energy is computed by going beyond a free-electron description of the metal surface, either within the GW approximation of many-body theory or with inclusion, within the GW$\Gamma$ approximation, of short-range exchange-correlation effects. Calculations of the decay rate of the first three image states on Cu(100) and the first image state on Cu(111) are also reported, and the impact of both band structure and many-body effects on the electron relaxation process is discussed.

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