Large magnetoresistance in the type-II Weyl semimetal semimetal WP[subscript 2]
Name
PhysRevB.96.121107.pdf
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1.97 MB
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Author(s)
Wang, Aifeng
Graf, D.
Liu, Yu
Du, Qianheng
Lei, Hechang
Petrovic, C.
Zheng, Jiabao
Date Issued
September 2017
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
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.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.96.121107
