The rare-earth monopnictide (REM) family, which hosts magnetic ground states with extreme magnetoresistance, has established itself as a fruitful playground for the discovery of interesting topological phases. Here, by using high-resolution angle-resolved photoemission spectroscopy complemented by first-principles density functional-theory based modeling, we examine the evolution of the electronic structure of the candidate REM Dirac semimetal NdSb across the magnetic transition. A complex angel-wing-like band structure near the zone center and three arc-like features at the zone corner have been observed. This dramatic reconstruction of the itinerant bands around the zone center is shown to be driven by the magnetic transition: Specifically,, the Nd 5d electron band backfolds at the Gamma point and hybridizes with the Sb 5p hole bands in the antiferromagnetic phase. Our study indicates that antiferromagnetism plays an intricate role in the electronic structure of the REM family.
@article{arxiv.2203.05879,
title = {Complex electronic structure evolution of NdSb across the magnetic transition},
author = {Anup Pradhan Sakhya and Baokai Wang and Firoza Kabir and Cheng-Yi Huang and M. Mofazzel Hosen and Bahadur Singh and Sabin Regmi and Gyanendra Dhakal and Klauss Dimitri and Milo Sprague and Robert Smith and Eric D. Bauer and Filip Ronning and Arun Bansil and Madhab Neupane},
journal= {arXiv preprint arXiv:2203.05879},
year = {2023}
}
Comments
13 pages, 13 figures; Supplemental Materials included