Electronic Structure in a Rare-Earth-Based Antiferromagnet TbNi₃Ga₉

Rare-earth-based intermetallics provide flexibility to study the electronic, magnetic, superconducting, and topological properties by tuning the crystal structure, composition, and spin-orbit coupling. Recently, RNi₃(Ga/Al)₉ intermetallic materials have been studied for their richness in broad range of exotic crystal, magnetic, heavy fermion, and quantum criticality behaviors. However, momentum-resolved electronic structure studies are lacking. Here, we present results of the angle-resolved photoemission spectroscopy measurements to reveal the underlying electronic structure and topology in TbNi₃Ga₉, both above and below the Néel temperature. This study will open up exciting avenues towards exploration of electronic properties in the chiral family of RNi₃(Ga/Al)₉ materials with wide range of intriguing properties.<br/><br/><i>** This work is supported by Idaho National Laboratory’s Laboratory Directed Research and Development program under Idaho Operations Office Contract DE-AC07-05ID14517, and Division of Materials Science and Engineering, Office of Basic Energy Sciences, Office of Science of the U.S. Department of Energy (DOE).</i>