J M Pitarke and M G Vergniory 2008 J. Phys.: Condens. Matter 20 304207 doi:10.1088/0953-8984/20/30/304207
J M Pitarke1,2,3 and M G Vergniory2,4
Show affiliationsAfter the early suggestion by John Pendry (1980 Phys. Rev. Lett. 45 1356) to probe unoccupied bands at surfaces through the time reversal of the photoemission process, the inverse-photoemission technique yielded the first conclusive experimental evidence for the existence of image-potential bound states at metal surfaces and has led, over the last two decades, to an active area of research in condensed-matter and surface physics. Here we describe the current status of the many-body theory of inelastic lifetimes of these image-potential states and also the Shockley surface states that exist near the Fermi level in the projected bulk band gap of simple and noble metals. New calculations of the self-energy and lifetime of surface states on Au surfaces are presented as well, using the GWΓ approximation of many-body theory.
73.20.At Surface states, band structure, electron density of states
78.70.-g Interactions of particles and radiation with matter
Issue 30 (30 July 2008)
Received 25 March 2008, in final form 23 April 2008
Published 8 July 2008
J M Pitarke and M G Vergniory 2008 J. Phys.: Condens. Matter 20 304207
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