Magnetic Weyl semimetal in K${}_2$Mn${}_3$(AsO${}_4$)${}_3$ with the minimum number of Weyl points

Abstract

The "Hydrogen atom" of magnetic Weyl semimetals, with the minimum number of Weyl points, have 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 two-fold 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 work provides a feasible platform to explore the intrinsic properties related to Weyl points, and the related device applications.

6 pages, 3 figures and 2 tables

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• Engineering the in-plane anomalous Hall effect in Cd${}_3$As${}_2$ thin films
• Magneto-optical Kerr effect in Weyl semimetals with broken inversion and time-reversal symmetries
• Intrinsic ferromagnetic axion states and a single pair of Weyl fermions in the stable-state Mn\emph{X}${}_2$\emph{B}${}_2$\emph{T}${}_6$-family materials
• Helical Fermi Arc in Altermagnetic Weyl Semimetal
• Defect Engineering for Stabilizing Magnetic and Topological Properties in Mn(Bi1-xSbx)2Te4
• Irreducible momentum-space spin structure of Weyl semimetals and its signatures in Friedel oscillations
• Giant-exchange-driven Vectorial Control of a Minimal Topological Magnet in Eu3In2As4