Spin-orbital order and excitons in magnetoresistive HoBi

Abstract

The rare-earth monopnictides $R\phantom{\rule{0}{0ex}}X$ have been found to exhibit exotic topological three-dimensional states, coupled to unique magnetotransport responses such as extreme magnetoresistance. These findings generated interest to understand the interplay between electronic band topology, transport, and magnetism in $R\phantom{\rule{0}{0ex}}X$. While neutron scattering is indispensable to fully characterize magnetism, there is very little modern work on this family of compounds. Since the details of the magnetism have a profound impact on the electronic band topology and transport in materials, the authors present here a thorough characterization of the magnetism in HoBi, based on modern neutron scattering techniques.