Magnetic Weyl semimetal in KMn(AsO) with the minimum number of Weyl points
arXiv:2204.13274 · doi:10.1103/PhysRevLett.128.176401
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 KMn(AsO). It exhibits only a pair of Weyl points constrained in the -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.
arXiv comment6 pages, 3 figures and 2 tables
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