Large Magnetoresistance over an Extended Temperature Regime in Monophosphides of Tantalum and Niobium

TL;DR

This study reports exceptionally large magnetoresistance in TaP and NbP compounds across a wide temperature range, with potential implications for understanding underlying electronic mechanisms.

Contribution

It demonstrates large magnetoresistance in TaP and NbP over an extended temperature range, suggesting complex underlying mechanisms beyond electron-hole resonance.

Findings

TaP exhibits linear MR of about 1.8×10^4 at 2 K in 9 Tesla

MR in TaP and NbP exceeds 300% at room temperature in 9 Tesla

Large MR persists across a broad temperature range, indicating complex mechanisms

Abstract

We report extremely large magnetoresistance (MR) in an extended temperature regime from 1.5 K to 300 K in non-magnetic binary compounds TaP and NbP. TaP exhibits linear MR around $1.8\times 10^4$ at 2 K in a magnetic field of 9 Tesla, which further follows its linearity up to $1.4\times 10^5$ in a magnetic field of 56 Tesla at 1.5 K. At room temperature the MR for TaP and NbP follows a power law of the exponent about $1.5$ with the values larger than $300\%$ in a magnetic field of 9 Tesla. Such large MR in a wide temperature regime is not likely only due to a resonance of the electron-hole balance, but indicates a complicated mechanism underneath.