6533b86dfe1ef96bd12c940b
RESEARCH PRODUCT
Dichroism in VUV photoemission from the (0001)-surfaces of ultrathin Gd and Nd films on W(110)
Gerd SchönhenseN. A. CherepkovAndreas OelsnerGerhard H. FecherCh. OstertagJ. Paulsubject
Circular dichroismValence (chemistry)Analytical chemistrychemistry.chemical_elementFermi energySurfaces and InterfacesDichroismPhotoelectric effectCondensed Matter PhysicsNeodymiumMolecular physicsSurfaces Coatings and FilmsCondensed Matter::Materials ScienceX-ray photoelectron spectroscopychemistryMaterials ChemistrySurface statesdescription
Abstract Ultrathin layers of Gd and Nd epitaxially grown on W(110) have been investigated using linearly and circularly polarised light at the 6.5 m NIM beamline at the BESSY storage ring in Berlin. The high quality of the films was monitored by the sharp and dispersionless surface state just below the Fermi energy. The CDAD (circular dichroism in the angular distribution of photoelectrons) measurements showed strong effects in the surface states as well as in the valence bands. The LMDAD (linear magnetic dichroism in…) from Gd(0001) showed a small, but significant splitting of the surface state. This splitting can be reproduced by numerical one-step calculations based on spin-dependent surface barriers. The photon energy-dependent intensities as well as the magnetic dichroism could be explained qualitatively by calculations within an atomic model giving evidence of a Fano-type resonance.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-04-01 | Surface Science |