Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe

Pascal Puphal, Vladimir Pomjakushin, Naoya Kanazawa, Victor Ukleev, Dariusz J. Gawryluk, Junzhang Ma, Muntaser Naamneh, Nicholas C. Plumb, Lukas Keller, Robert Cubitt, Ekaterina Pomjakushina, Jonathan S. White

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

We report the discovery of topological magnetism in the candidate magnetic Weyl semimetal CeAlGe. Using neutron scattering we find this system to host several incommensurate, square-coordinated multi-k→ magnetic phases below TN. The topological properties of a phase stable at intermediate magnetic fields parallel to the c axis are suggested by observation of a topological Hall effect. Our findings highlight CeAlGe as an exceptional system for exploiting the interplay between the nontrivial topologies of the magnetization in real space and Weyl nodes in momentum space.

Original languageEnglish
Article number017202
JournalPhysical Review Letters
Volume124
Issue number1
DOIs
StatePublished - 7 Jan 2020
Externally publishedYes

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