Extremely large magnetoresistance and Fermi surface topology of PrSb

TL;DR

This study investigates the magnetotransport properties and Fermi surface topology of PrSb, revealing extremely large magnetoresistance, a two-dimensional Fermi surface component, and trivial topological characteristics.

Contribution

It provides detailed angle-dependent measurements of Fermi surface evolution and demonstrates the trivial topology of PrSb's Fermi surface through high-field analysis.

Findings

PrSb exhibits extremely large magnetoresistance at low temperatures.

The Fermi surface shows a two-dimensional character with a four-fold symmetry.

The Fermi surface enlarges up to 14 T and then stabilizes, with trivial topology indicated by zero Berry phase.

Abstract

We report magnetotransport measurements of PrSb in high magnetic fields. Our results show that PrSb exhibits extremely large magnetoresistance(XMR) at low temperatures. Meanwhile angle-dependent magnetoresistance measurements were used to probe the Fermi surface via Shubnikov-de Haas (SdH) oscillations. The angular dependence of the frequencies of the $\alpha$-branch indicate a two-dimensional character for this Fermi surface sheet, while the effective mass of this branch as a function of angle shows a four-fold signature. The evolution of the Fermi surface with field was also studied up to 32~T. An enlargement of the Fermi surface up to 14~T is observed, before the oscillation frequencies become constant at higher fields. Meanwhile our analysis of the residual Landau index from the high field data reveals a zero Berry phase and therefore trivial topology of the Fermi surface.