Abstract
Electron bands in solids can be determined in angle-resolved photoemission experiments from thin films, where the perpendicular wave vector uncertainty that characterizes photoemission from bulk crystals is removed. However, the comparison with state-of-the-art quasiparticle band-structure calculations has never been done. In this work we have mapped both initial-state (occupied) and final-state (empty) bands along the axis of aluminum, from photon-energy- and thickness-dependent quantum-well spectra of aluminum films. For final states the best fit is obtained with inverse low-energy electron diffraction band structure calculations. For initial-state bands of Cu and Al, thin-film data display excellent agreement with bulk quasiparticle theory, suggesting the use of thin films as model systems to investigate fine effects in the crystal band structure.
- Received 23 July 2003
DOI:https://doi.org/10.1103/PhysRevB.69.115422
©2004 American Physical Society