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research article
Dielectric response of oxides in the weighted density approximation
2000
Calculations of the static dielectric response epsilon (infinity) of some simple oxide and mixed transition-metal oxide insulators using the weighted density approximation are reported, including in particular the perovskites KNbO3, KTaO3, and BaTiO3. The results show that even though the weighted density approximation makes only small changes to the local density band gaps, the values of epsilon (infinity) are consistently lowered, improving agreement with experiment.
Type
research article
Authors
Publication date
2000
Published in
Volume
62
Issue
19
Start page
12724
End page
12729
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
June 29, 2012
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