A first-principles study of the effect of vacancy defects on the electronic structures of greigite (Fe₃S₄).

ABSTRACT: Greigite (Fe₃S₄) is a ferrimagnetic mineral with an inverse spinel structure. Besides its importance in the bio-geochemical cycle, it also has great potential applications for its unique properties such as its half metallic electronic structure at ambient condition. However, it has been challenging to get high purity and crystallinity samples of greigite in experiment, and the defect effect on the electronic structure of greigite was not clear. In the present study, first-principles calculations have been performed to investigate the ground state electronic structure of greigite with monovacancy. It is found that, with an vacancy concentration lower than 3.6%, the greigite with an Fe vacancy is an insulator with charge orderings, while the greigite with a S vacancy be

SUBMITTER: Wu M 

PROVIDER: S-EPMC6065442 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature