Magnetic Weyl Semimetal in ${\mathrm{K}}_{2}{\mathrm{Mn}}_{3}({\mathrm{AsO}}_{4}{)}_{3}$ with the Minimum Number of Weyl Points

Magnetic Weyl Semimetal in $K_{2} {Mn}_{3} ({AsO}_{4})_{3}$ with the Minimum Number of Weyl Points

Simin Nie, Tatsuki Hashimoto, and Fritz B. Prinz

Phys. Rev. Lett. 128, 176401 – Published 27 April 2022

Abstract

The “hydrogen atom” of magnetic Weyl semimetals, with the minimum number of Weyl points, has received growing attention recently due to the possible presence of Weyl-related phenomena. Here, we report a nontrivial electronic structure of the ferromagnetic alluaudite-type compound $K_{2} {Mn}_{3} ({AsO}_{4})_{3}$ . It exhibits only a pair of Weyl points constrained in the $z$ direction by the twofold rotation symmetry, leading to extremely long Fermi arc surface states. In addition, the study of its low-energy effective model results in the discovery of various topological superconducting states, such as the hydrogen atom of a Weyl superconductor. Our Letter provides a feasible platform to explore the intrinsic properties related to Weyl points, and the related device applications.

Received 28 September 2021
Revised 25 March 2022
Accepted 30 March 2022

DOI:https://doi.org/10.1103/PhysRevLett.128.176401

Physics Subject Headings (PhySH)

Topological phases of matter Topological superconductors Weyl fermions

Topological materials Weyl semimetal

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Simin Nie ^1,*,†, Tatsuki Hashimoto^2,†, and Fritz B. Prinz^1,2,‡

¹Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
²Department of Mechanical Engineering, Stanford University, Stanford, California 94305, USA

^*smnie@stanford.edu
^†S. N. and T. H. contributed equally to this work.
^‡fprinz@stanford.edu

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Vol. 128, Iss. 17 — 29 April 2022

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Physical Review Letters

Magnetic Weyl Semimetal in K2Mn3(AsO4)3 with the Minimum Number of Weyl Points

Simin Nie, Tatsuki Hashimoto, and Fritz B. Prinz

Phys. Rev. Lett. 128, 176401 – Published 27 April 2022

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Magnetic Weyl Semimetal in $K_{2} {Mn}_{3} ({AsO}_{4})_{3}$ with the Minimum Number of Weyl Points