Quintuplet Condensation in the Skyrmionic Insulator Cu 2 OSeO 3 at Ultrahigh Magnetic Fields
Abstract
We report ultrahigh magnetic field Faraday rotation results on the chiral helimagnet Cu_{2}OSeO_{3}, the first Mott insulator showing skyrmion lattice phases and a linear magnetoelectric effect. Between 180 and 300 T, we find signatures of a Bose-Einstein condensation of magnons, which can be described as a canted XY ferrimagnet. Because of the magnetoelectric coupling, the transverse magnetic order of the individual Cu^{2+} spins is accompanied by a characteristic domelike electric polarization which is crucial for the observation of the condensate via the Faraday rotation effect.
Fields of Study & Subjects
Theoretical and Computational Physics
Advanced Condensed Matter Physics
Magnetic and transport properties of perovskites and related materials
Publication details
- Journal / source
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Volume
- 136
- Issue
- 7
- Pages
- 076703–076703
- Publication date
- 21 January 2026
- Language
- EN