Semicore states of transition metals such as iron are outside the reach of “stan- dard” pseudopotential of DFT which, even when non linear core corrections are adopted, include them in the frozen atomic core. In this work we present an analysis of several pseudopotentials for iron generated in the Troullier Mar- tins and Hamann scheme assuming both local density and generalized gradient approximations (LDA, GGA) for the exchange–correlation functional and con- sidering core-valence partitions with and without including semicore orbitals among valence states. Non linear core corrections are considered and the pseu- dopotential transferability has been checked. We calculate structural and elec- tronic properties of the α phase of iron and we present a comparison between calculated optical conductivity and experimental data.
Norm conserving pseudopotentials for iron with semicore states / L. Caramella, D. Tavella, G. Onida - In: Epioptics 10 : proceedings of the 43. course of the International school of solid state physics, Erice, Italy, 19–26 July 2008 / [a cura di] A. Cricenti. - New Jersey : World Scientific, 2010 Jun. - ISBN 978-981-4322-39-3. - pp. 37-45 (( Intervento presentato al 10. convegno Epioptics : 43. course of the International school of solid state physics tenutosi a Erice, Italy nel 2008.
Norm conserving pseudopotentials for iron with semicore states
L. CaramellaPrimo
;G. OnidaUltimo
2010
Abstract
Semicore states of transition metals such as iron are outside the reach of “stan- dard” pseudopotential of DFT which, even when non linear core corrections are adopted, include them in the frozen atomic core. In this work we present an analysis of several pseudopotentials for iron generated in the Troullier Mar- tins and Hamann scheme assuming both local density and generalized gradient approximations (LDA, GGA) for the exchange–correlation functional and con- sidering core-valence partitions with and without including semicore orbitals among valence states. Non linear core corrections are considered and the pseu- dopotential transferability has been checked. We calculate structural and elec- tronic properties of the α phase of iron and we present a comparison between calculated optical conductivity and experimental data.Pubblicazioni consigliate
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