Abstract
(001) thin films grown on Ge(111) were studied by angle- and spin-resolved photoemission using synchrotron radiation in the 17–40 eV photon energy range. The photoelectron spectra were simulated starting from a first-principles band-structure calculation for the ground state, using the free-electron approximation for the final states, taking into account photohole lifetime effects and broadening plus correlation effects, but ignoring transition matrix elements. The measured spin polarizations for the various k points investigated in the plane of the Brillouin zone are found to be in fair enough agreement with the simulated ones, providing a strong support to the ground-state band-structure calculations. Possible origins for the departures between either simulations and experiments or previous and present experiments are discussed.
- Received 21 October 2014
- Revised 16 February 2015
DOI:https://doi.org/10.1103/PhysRevB.91.125118
©2015 American Physical Society