The magnetic order, tunable spin-canting, and band structure of a candidate Weyl semi-metal

Weyl semi-metals are novel materials which give experimental reality to exotic chiral quasi-particles originally predicted by relativistic wave equations, and in so doing provide properties desirable for device applications. However, as an unfortunate result of nature’s seeming preference for inversion symmetry breaking Weyl materials, the desired physics is often ostensibly obscured by myriad Weyl points which give rise to higher order interactions muddying clear signatures of the Weyl physics. One route to avoid this downfall is to find materials whose Weyl nodes are formed by time-reversal symmetry breaking which theoretically allows for the minimal number of Weyl points. Thus, there is a vibrant ongoing search for such ideal magnetic Weyl semi-metals with only a single split Dirac point and thus set of Weyl points. In this talk we will discuss the study of one such candidate material, elucidate its magnetic structure, provide a possible mechanism to optimize that structure for the Weyl physics and reveal how the magnetic symmetry tunes the electronic band structure.