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Large magnetoresistance in the type-II Weyl semimetal semimetal WP[subscript 2]

Author(s)
Wang, Aifeng; Graf, D.; Liu, Yu; Du, Qianheng; Lei, Hechang; Petrovic, C.; Zheng, Jiabao; ... Show more Show less
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Abstract
We report a magnetotransport study on type-II Weyl semimetal WP[subscript 2] single crystals. Magnetoresistance exhibits a nonsaturating H[superscript n] field dependence (14 300% at 2 K and 9 T), whereas systematic violation of Kohler's rule was observed. Quantum oscillations reveal a complex multiband electronic structure. The cyclotron effective mass close to the mass of free electron m[subscript e] was observed in quantum oscillations along the b axis, while a reduced effective mass of about 0.5m[subscript e] was observed in a-axis quantum oscillations, suggesting Fermi surface anisotropy. The temperature dependence of the resistivity shows a large upturn that cannot be explained by the multiband magnetoresistance of conventional metals. Even though the crystal structure of WP[subscript 2] is not layered as in transition-metal dichalcogenides, quantum oscillations suggest partial two-dimensional character.
Date issued
2017-09
URI
http://hdl.handle.net/1721.1/113349
Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Journal
Physical Review B
Publisher
American Physical Society
Citation
Wang, Aifeng, et al. “Large Magnetoresistance in the Type-II Weyl Semimetal WP 2.” Physical Review B, vol. 96, no. 12, Sept. 2017. © 2017 American Physical Society
Version: Final published version
ISSN
2469-9950
2469-9969

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