Abstract
Spin-split adsorbate-induced bands have been observed for oxygen and sulfur on Fe(100) by use of spin-polarized angle-resolved photoemission. For the -symmetry orbitals, the exchange splitting is considerably larger at the Brillouin-zone center (1.3 eV for O, 0.5 eV for S) than at the zone edge (0.25 and 0.2 eV, respectively). This is attributed to enhanced hybridization with substrate orbitals when the adsorbate band overlaps the bulk continuum. Our observation of an exchange splitting provides evidence of a small magnetic moment on the adsorbate atoms. Our results also indicate that the adsorbate layer is ferromagnetically aligned with the substrate.
- Received 5 August 1988
DOI:https://doi.org/10.1103/PhysRevLett.61.2257
©1988 American Physical Society