Photoemission spectroscopy in metals: band structure-Fermi surface-spectral function

Angular resolved photoelectron spectroscopy plays a key role in the study o f the electronic structure of solids. We discuss recent methodical developm ents in its application to metallic systems. These include a new procedure for absolute E(k) band structure determination, which allows complete contr ol of the three-dimensional wave-vector k, as well as a method for Fermi su rface mapping based on measurements of the angular photoelectron intensity distribution. Going beyond a simple one-electron picture, we examine under which conditions the photoemission signal can be interpreted in terms of th e electron removal spectrum of an interacting electron system and discuss a n experimental test on a suitable Fermi liquid metal, which supports this m any-body interpretation. (C) 1999 Elsevier Science B.V. All rights reserved .