The rare-earth monopnictide family is attracting an intense current interest driven by its unusual extreme magnetoresistance (XMR) property and the potential presence of topologically non-trivial surface states. The experimental observation of non-trivial surface states in this family of materials are not ubiquitous. Here, using high-resolution angle-resolved photoemission spectroscopy (ARPES), magnetotransport, and parallel first-principles modeling, we examine the nature of electronic states in HoSb. Although we find the presence of bulk band gaps at the G and X-symmetry points of the Brillouin zone (BZ), we do not find these gaps to exhibit band inversion so that HoSb does not host a Dirac semimetal state. Our magnetotransport measurements indicate that HoSb can be characterized as a correlated nearly-complete electron-hole-compensated semimetal. Our analysis reveals that the nearly perfect electron-hole compensation could drive the appearance of non-saturating XMR effect in HoSb.
@article{arxiv.2008.06962,
title = {Observation of gapped state in rare-earth monopnictide HoSb},
author = {M. Mofazzel Hosen and Gyanendra Dhakal and Baokai Wang and Narayan Poudel and Bahadur Singh and Klauss Dimitri and Firoza Kabir and Christopher Sims and Sabin Regmi and William Neff and Anan Bari Sarkar and Amit Agarwal and Daniel Murray and Franziska Weickert and Krzysztof Gofryk and Orest Pavlosiuk and Piotr Wisniewski and Dariusz Kaczorowski and Arun Bansil and Madhab Neupane},
journal= {arXiv preprint arXiv:2008.06962},
year = {2020}
}
Comments
13 pages, 10 figures, Supplementary Information included