Theoretical and Experimental Solid State Physics: Electronic and Structural properties of Alkali and Alkaline Hydrides using Density Functional Theory - Softcover

Ofe, Uko

Softcover

ISBN 10: 3659586439 ISBN 13: 9783659586439

Verlag: LAP LAMBERT Academic Publishing, 2014

Inhaltsangabe

Density Functional Theory has proved to be a fast and efficient method for calculating various properties of solid insulating materials. From our studies, we have observed that calculations of the structural and electronic properties of alkali metal hydrides LiH, NaH, KH, RbH and CsH) and alkaline earth metal hydrides (BeH2, MgH2, CaH2, SrH2 and BaH2) reveal the exact problem with the description for these compounds within PBE formulation of generalized gradient approximation (GGA), which is our principal focus.Generally, for the hydrides accurate calculation of the band gap requires computationally extensive approach as GW method or time-dependent DFT. In this work, a new and more efficient method, GGA + U, which significantly improves the description of the electronic structure in DFT has been used; thus, in this proposed method, our results were in agreement with other theoretical and experimental results obtained by other investigators. GGA+U approach is based on the Hubbard model applied for exchange-correlation function to hydrogen atoms, even though the metal hydrides are not strongly correlated materials.

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Über die Autorin bzw. den Autor

Dr. Uko Ofe did his B.Sc(Mathematics)from the University of Nigeria Nsukka; his M.sc (Theoretical Nuclear Physics) from the University of Calabar, Nigeria; and obtained his PhD (Theoretical and Experimental Solid State Physics)from the same university. He has published papers on topics in Density Functional Theory in reputable journals.

Details zur Ausgabe

• Verlag: LAP LAMBERT Academic Publishing
• Erscheinungsdatum: 2014
• Sprache: Englisch
• ISBN 10: 3659586439
• ISBN 13: 9783659586439
• Einband: Taschenbuch
• Anzahl der Seiten: 228
• Kontakt zum Hersteller: Nicht verfügbar
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