Higher-order multipole state detected in hematite, a main component of rust

Combining X-ray measurements under an electric field with first-principles calculations

Researchers from the University of Tokyo and RIKEN, working with collaborators in France, report developing a method that irradiates hematite with X-rays while applying an electric field. They say the method detected a higher-order multipole state and captured ion displacements at the trillionth-of-a-millimeter scale.

The supplied report does not provide a directly comparable prior measurement or baseline for this material.

The group reports that its electric-field X-ray absorption method, combined with first-principles calculations, detected a higher-order multipole state in hematite.

The reported result provides a way to probe a complex electronic state in hematite, a common iron oxide associated with rust. The supplied material does not establish practical applications.