Abstract
Interplay between magnetism and electronic band topology is of central current interest in topological matter research. We use quantum oscillations as a powerful tool to probe the evolution of band topology in the Dirac semimetal . The Eu local magnetic moments display different antiferromagnetic states below 25 K and a field-polarized phase above 16 T. Upon cooling from 65 K into the field-polarized state, an exotic temperature-dependent shift of oscillation peaks arises, accompanied by the development of nonzero Berry phase and a huge unconventional splitting of the oscillations. Band-structure calculations confirm the change from trivial to nontrivial band topology induced by the ferromagnetic Eu state, classifying as a unique magnetic topological semimetal.
- Received 9 February 2022
- Revised 19 December 2022
- Accepted 7 February 2023
- Corrected 20 April 2023
DOI:https://doi.org/10.1103/PhysRevB.107.L081112
©2023 American Physical Society
Physics Subject Headings (PhySH)
Corrections
20 April 2023
Correction: The previously published Figure 1 was edited incorrectly during the proof production process, resulting in the improper rendering of two axis labels in panels (a) and (b). The entire figure has been replaced.