Synthesis and characterization of a new topological semimetal enabled by a charge density wave*

Formation of charge density waves (CDWs) is a known mechanism to induce an energy gap or partial energy gap at the Fermi surface. Therefore, introducing a CDW can be a way to modify the band structure. In this work, we discuss the potential of a CDW being the key to realize materials with clean topological semimetal band structures, by gapping out unwanted trivial states at the Fermi level. We will introduce a class of materials that exhibits CDWs and discuss the effect of the structural distortion on the electronic structure. Finally, we will present electrical transport and angle resolved photoemission spectroscopy (ARPES) data on one magnetic topological semimetal candidate, which was identified through this method.