Magnetotransport properties and fermiology in a layered rare-earth intermetallics*

While a growing number of nonmagnetic topological phases are being proposed and discovered, the search for materials that combine nontrivial electronic topology with strong correlations has advanced at a slower pace [1]. Most studies have focused on doping magnetic elements into nonmagnetic topological materials [2] in which random disorder and low magnetic transition temperature are inevitable. Realization of magnetic topological state in stoichiometric compounds has the potential to enable an approach to the intrinsic properties of the system, and provide a chance to design candidates for higher temperature quantized anomalous Hall effect and axion electrodynamics [3]. We will discuss our recent attempts to design, synthesize, and characterize magnetic topological semimetals with a focus on layered materials with non-trivial magnetic order arising from rare-earth ions. We will describe transport, spectroscopic, and neutron scattering measurements as well as ab-initio calculations to develop an understanding of their underlying electronic/magnetic structure.
References
[1] T. Zhang et al., Nature 566, 475 (2019).
[2] C.-Z. Chang et al., Science 340, 167 (2013).
[3] R. Li et al., Nat. Phys. 6, 284 (2010).