Unusual magnetotransport in holmium monoantimonide

TL;DR

This paper investigates the magnetotransport properties of HoSb, revealing large magnetoresistance, magnetic phase transition effects, and potential nontrivial electronic structure due to spin-orbit interaction.

Contribution

It provides new insights into the magnetic field effects on HoSb's electronic structure and transport, highlighting phenomena not observed in similar rare earth monopnictides.

Findings

HoSb exhibits extremely large magnetoresistance (XMR).

Magnetic phase transitions cause kinks in resistivity curves.

SdH oscillations reveal split Fermi surfaces and possible nontrivial topology.

Abstract

We report the magnetotransport properties of HoSb, a semimetal with antiferromagnetic ground state. HoSb shows extremely large magnetoresistance (XMR) and Shubnikov-de Haas (SdH) oscillation at low temperature and high magnetic field. Different from previous reports in other rare earth monopnictides, kinks in $\rho(B)$ and $\rho_{xy}(B)$ curves and the field dependent resistivity plateau are observed in HoSb, which result from the magnetic phase transitions. The fast Fourier transform analysis of the SdH oscillation reveals the split of Fermi surfaces induced by the nonsymmetric spin-orbit interaction. The Berry phase extracted from SdH oscillation indicates the possible nontrivial electronic structure of HoSb in the presence of magnetic field. The Hall measurements suggest that the XMR originates from the electron-hole compensation and high mobility.