Electronic structural and magnetic properties of cadmium chalcogenide beryllosilicate sodalites |
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Authors: | Y Duan M Jungen |
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Institution: | (1) Institute of Physical Chemistry, University of Basel, Klingelbergstrasse 80, 4056, Basel, Switzerland, CH |
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Abstract: | Density functional self-consistent spin-polarized calculations with the Discrete Variational Method were performed to obtain
the electronic structures of cadmium chalcogenide beryllosilicate sodalites Cd8BeSiO4]6Z2 and their bulk materials CdZ (Z = S, Se, Te). Similar as their bulk materials, these sodalites are also semiconductors. From
their density of states and charge distributions, it was found that there is greater localization of the electron density
in the sodalites compared with that of the bulk. The band gaps in their bulk compounds are different from those in the sodalite
structures due to the electrons of Si, Be and O filled in. Different from their bulk materials, the d electrons of Cd play
an important role to form an unseparated valence band with all orbitals of other elements. The calculated magnetic moments
of these three materials are very small since all d atomic orbitals are fully occupied.
Received: 28 March 1997 / Revised: 18 July 1997 / Accepted: 9
September 1997 |
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Keywords: | PACS 71 20 -b Electron density of states and band structure of crystalline solids - 75 50 Ee Antiferromagnetics - 82 90 +j Other topics in physical chemistry |
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