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arXiv · 1903.05914

Nonsaturating large magnetoresistance in the high carrier density nonsymmorphic metal CrP

Q. Niu·W. C. Yu·E. I. Paredes Aulestia·Y. J. Hu·Kwing To Lai·H. Kotegawa·E. Matsuoka·H. Sugawara·H. Tou·D. Sun·F. F. Balakirev·Y. Yanase·Swee K. Goh
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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.

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Q. Niu, W. C. Yu, E. I. Paredes Aulestia, Y. J. Hu, Kwing To Lai, H. Kotegawa, E. Matsuoka, H. Sugawara, H. Tou, D. Sun, F. F. Balakirev, Y. Yanase, Swee K. Goh. 2019-03-14. Nonsaturating large magnetoresistance in the high carrier density nonsymmorphic metal CrP. https://doi.org/10.1103/physrevb.99.125126

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