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Modified Urbach's rule and frozen phonons in glasses

✍ Scribed by I. A. Weinstein; A. F. Zatsepin


Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
156 KB
Volume
1
Category
Article
ISSN
1862-6351

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The equilibrium ground-state structure of LiNbO 3 in the paraelectric and ferroelectric phases is fully optimized in a firstprinciples calculation using the full-potential linearized augmented plane wave method. The equilibrium volume, c=a ratio and all (four, in the ferroelectric phase) internal pa