Pressure-induced spin-state ordering in Sr${}_2$CoO${}_3$F

Abstract

We study theoretically low-temperature phases of a recently synthesized compound Sr${}_2$CoO${}_3$F under pressure. The analysis combining LDA+DMFT and a strong-coupling effective model points to the existence of not only normal paramagnetic and antiferromagnetic regimes, but also a spin-state ordered phase in a certain range of applied pressure and low temperature. This order is characterized by a checkerboard arrangement of different spin states of cobalt atoms in the lattice.

7 pages, 7 figures

References in corpus (3)

• Disproportionation and Metallization at Low-Spin to High-Spin Transition in Multiorbital Mott Systems
• Low-energy excitation spectra in the excitonic phase of cobalt oxides
• Excitonic magnetism in $d^6$ perovskites

Cited by in corpus (1)

• Dynamical response and competing orders in two-band Hubbard model