# Nonsaturating large magnetoresistance in the high carrier density nonsymmorphic metal CrP

## TL;DR

This study investigates the nonsaturating, quadratic magnetoresistance in the high carrier density nonsymmorphic metal CrP, revealing features similar to extreme magnetoresistance materials despite its different electronic structure.

## Contribution

It demonstrates that CrP exhibits nonsaturating quadratic magnetoresistance linked to its nonsymmorphic symmetry, providing insights into the origins of large magnetoresistance in metals.

## Key findings

- CrP shows nonsaturating, quadratic magnetoresistance up to 14 T.
- The magnetoresistance behavior resembles that of XMR materials.
- CrP's electronic structure features a nonsymmorphic symmetry-protected crossing.

## Abstract

The band structure of high carrier density metal CrP features an interesting crossing at the Y point of the Brillouin zone. The crossing, which is protected by the nonsymmorphic symmetry of the space group, results in a hybrid, semi-Dirac-like energy-momentum dispersion relation near Y. The linear energy-momentum dispersion relation along Y-$\Gamma$ is reminiscent of the observed band structure in several semimetallic extremely large magnetoresistance (XMR) materials. We have measured the transverse magnetoresistance of CrP up to 14 T at temperatures as low as $\sim$ 16 mK. Our data reveal a nonsaturating, quadratic magnetoresistance as well as the behaviour of the so-called `turn-on' temperature in the temperature dependence of resistivity. Despite the difference in the magnitude of the magnetoresistance and the fact that CrP is not a semimetal, these features are qualitatively similar to the observations reported for XMR materials. Thus, the high-field electrical transport studies of CrP offer the prospect of identifying the possible origin of the nonsaturating, quadratic magnetoresistance observed in a wide range of metals.