Year: 2021
Type: article
Abstract: Fundamental block and staggered orders of magnetic Fe multipoles in ${\mathrm{Na}}_{2}\mathrm{Fe}{\mathrm{Se}}_{2}$ are classified by their symmetry and magnetoelectric properties. Our minimal structure models incorporate ferromagnetic or antiferromagnetic coupling between chains, and they are not compatible with axial ferromagnetism. The ferrate salt is valued in studies of highly correlated electrons as the only iron selenide known to possess chainlike structural units hosting ferrous cations. Axial and polar (Dirac) multipoles are compulsory in the electronic structure since Fe ions exhibit enantiomorphic symmetry in the parent ${\mathrm{K}}_{2}\mathrm{Zn}{\mathrm{O}}_{2}$-type compound. Calculated Bragg diffraction patterns for neutrons and x rays prove that the techniques can unlock individual contributions from both multipole types.
Authors: S. W. Lovesey, D. D. Khalyavin
Language: Latvian
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W3080520362