Confirmation of magnetic structure of Weyl Semimetal Eu3PbO in applied magnetic field

Materials with nontrivial topological properties (analogous in a general way to the familiar Moebius strip) are a hot topic in current solid state physics. In particular new materials showing different classes of topologically nontrivial electronic states are intensively searched for. The antiperovskite Eu3PbO may display a new type of Weyl point in the electronic structure (namely a 'magnetic Weyl point') and we have previously used polycrystalline sampled on WISH to investigate this hypothesis. However, our current data cannot distinguish between the collinear and noncollinear models we have identified. We therefore require single crystal data to discriminate between these two candidate models and confirm the magnetic phases of Eu3PbO, which is critical for understanding its intrugiong and topical topological properties as a function of field.