Improved electronic structure and magnetic exchange interactions in transition metal oxides.

Journal Article (Journal Article)

We discuss the application of the Agapito Curtarolo and Buongiorno Nardelli (ACBN0) pseudo-hybrid Hubbard density functional to several transition metal oxides. For simple binary metal oxides, ACBN0 is found to be a fast, reasonably accurate and parameter-free alternative to traditional DFT  +  U and hybrid exact exchange methods. In ACBN0, the Hubbard energy of DFT  +  U is calculated via the direct evaluation of the local Coulomb and exchange integrals in which the screening of the bare Coulomb potential is accounted for by a renormalization of the density matrix. We demonstrate the success of the ACBN0 approach for the electronic properties of a series technologically relevant mono-oxides (MnO, CoO, NiO, FeO, both at equilibrium and under pressure). We also present results on two mixed valence compounds, Co3 O4 and Mn3 O4 . Our results for these binary oxides and all the materials we have investigated, obtained at the computational cost of a standard LDA/PBE calculation, are in excellent agreement with hybrid functionals, the GW approximation and experimental measurements.

Full Text

Duke Authors

Cited Authors

  • Gopal, P; De Gennaro, R; Gusmao, MSDS; Al Rahal Al Orabi, R; Wang, H; Curtarolo, S; Fornari, M; Buongiorno Nardelli, M

Published Date

  • November 2017

Published In

Volume / Issue

  • 29 / 44

Start / End Page

  • 444003 -

PubMed ID

  • 28809161

Electronic International Standard Serial Number (EISSN)

  • 1361-648X

International Standard Serial Number (ISSN)

  • 0953-8984

Digital Object Identifier (DOI)

  • 10.1088/1361-648x/aa8643

Language

  • eng