Symmetry considerations on band filling and first optical transition in NiO

John E. Petersen (), Luisa M. Scolfaro, Pablo D. Borges and Wilhelmus J. Geerts
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John E. Petersen: Texas State University
Luisa M. Scolfaro: Texas State University
Pablo D. Borges: Texas State University
Wilhelmus J. Geerts: Texas State University

The European Physical Journal B: Condensed Matter and Complex Systems, 2019, vol. 92, issue 10, 1-7

Abstract: Abstract Recent theoretical works on NiO have not agreed upon the nature of the first optical transition. By altering band filling – with highly concentrated O vacancies and Fe impurities – here, the orbital density of states is changed near the Fermi energy. The variation in optical properties, relative to the changes in orbital character, along with group theory analysis of hybridized orbitals, provides new insight when evaluating the first optical transition of NiO. Here, based on density functional theory, the first optical transition is found to have two possibilities – either superexchange site-hopping or a transition from the hybridized eg state to the hybridized a1u state, rather than the intra-atomic transitions which are causing disagreement in the recent literature. Graphical abstract

Keywords: Computational; Methods (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1140/epjb/e2019-100363-5

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