Esther Belin-Ferré et al 1996 J. Phys.: Condens. Matter 8 6213 doi:10.1088/0953-8984/8/34/011
Electronic distributions and pseudo-gap in quasicrystalline decagonal 
and 
alloys
Esther Belin-Ferré
, Zoltán Dankházi,
, Vincent Fournée, Anne Sadoc§,||, Claire Berger¶, Herbert Müller+ and Hans Kirchmayr+
Electronic state distributions of decagonal 
and 
quasicrystals have been investigated by experimental means using the soft-x-ray spectroscopy technique complemented by photoemission spectroscopy measurements. In both quasicrystals, interaction is shown within an energy range of 2 eV below the Fermi level between the Al states and either the Co 3d states or both the Ni 3d and the Co 3d states. In , the Cu 3d states are observed in the middle of the occupied band. The formation of a significant pseudo-gap at the Fermi level is shown in the Al 3p and 3s - d distributions of these alloys. The comparison with available photoemission data an 
and samples shows good agreement in the energy positions of Cu, Co and Ni occupied states. The results for are compared with calculations of densities of states for two models of the Al - Co - Cu decagonal quasicrystals. Very good agreement between experiment and one of these calculations is found for the Al distributions. For , fair agreement between the present results and data for crystalline 
is shown. The Al p and Ni s - d unoccupied states are considered as well in . It is suggested that a slight charge transfer may occur from Al to Ni in this sample and that most of the Al p unoccupied states presumably occur from the contribution of the quasiperiodic planes in this specimen.
- PACS
-
78.70.-g Interactions of particles and radiation with matter
- Subjects
- Dates
-
Issue 34 (19 August 1996)
Received 5 February 1996, in final form 26 April 1996
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Electronic distributions and pseudo-gap in quasicrystalline decagonal and alloys
Esther Belin-Ferré et al 1996 J. Phys.: Condens. Matter 8 6213
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