Verwey-Type Charge Ordering and Site-Selective Mott Transition in Fe₄O₅ under Pressure.

ABSTRACT: The metal-insulator transition driven by electronic correlations is one of the most fundamental concepts in condensed matter. In mixed-valence compounds, this transition is often accompanied by charge ordering (CO), resulting in the emergence of complex phases and unusual behaviors. The famous example is the archetypal mixed-valence mineral magnetite, Fe₃O₄, exhibiting a complex charge-ordering below the Verwey transition, whose nature has been a subject of long-time debates. In our study, using high-resolution X-ray diffraction supplemented by resistance measurements and DFT+DMFT calculations, the electronic, magnetic, and structural properties of recently synthesized mixed-valence Fe₄O₅ are investigated under pressure to ∼100 GPa. Our calculati

SUBMITTER: Layek S 

PROVIDER: S-EPMC9204770 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature