Prediction of electronic, structural and elastic properties of the hardest oxide: TiO2
This work combines the theory of elasticity with first principles quantum mechanic calculations to predict the electronic, structural and elastic properties: elastic constants, bulk moduli of the TiO2 (Titania) in the Pnma phase. Band‐structure shows a direct gap in Γ which increases its value under...
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Published in: | Physica Status Solidi (b) 2009-03, Vol.246 (3), p.599-603 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | This work combines the theory of elasticity with first principles quantum mechanic calculations to predict the electronic, structural and elastic properties: elastic constants, bulk moduli of the TiO2 (Titania) in the Pnma phase. Band‐structure shows a direct gap in Γ which increases its value under hydrostatic pressure. It has two regimes: in the range 0–50 GPa the band‐gap has a negative second pressure derivative and changes its sign in the range 50–100 GPa. The band gap becomes indirect at pressures above 150 GPa. This phase improves its mechanical stability and insulator properties under extreme conditions of hydrostatic pressures. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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ISSN: | 0370-1972 1521-3951 |
DOI: | 10.1002/pssb.200880540 |