Magnetism-induced topological transition in EuAs₃.

ABSTRACT: The nature of the interaction between magnetism and topology in magnetic topological semimetals remains mysterious, but may be expected to lead to a variety of novel physics. We systematically studied the magnetic semimetal EuAs₃, demonstrating a magnetism-induced topological transition from a topological nodal-line semimetal in the paramagnetic or the spin-polarized state to a topological massive Dirac metal in the antiferromagnetic ground state at low temperature. The topological nature in the antiferromagnetic state and the spin-polarized state has been verified by electrical transport measurements. An unsaturated and extremely large magnetoresistance of ~2 × 10⁵% at 1.8 K and 28.3 T is observed. In the paramagnetic states, the topological nodal-line structure at t

SUBMITTER: Cheng E 

PROVIDER: S-EPMC8635340 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature