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Title: Large magnetoresistance in the type-II Weyl semimetal WP 2

Journal Article · · Physical Review B
 [1];  [2];  [1];  [3];  [4];  [5];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  2. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab.
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Dept. of Materials Science and Chemical Engineering
  4. Columbia Univ., New York, NY (United States). Dept. of Electrical Engineering; Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Electrical Engineering and Computer Science
  5. Renmin Univ. of China, Beijing (China). Dept. of Physics. Beijing Key Lab. of Opto-electronic Functional Materials and Micro-nano Devices

In this paper, we report a magnetotransport study on type-II Weyl semimetal WP2 single crystals. Magnetoresistance exhibits a nonsaturating Hn 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 me was observed in quantum oscillations along the b axis, while a reduced effective mass of about 0.5 me was observed in α-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. Finally, even though the crystal structure of WP2 is not layered as in transition-metal dichalcogenides, quantum oscillations suggest partial two-dimensional character.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Florida State Univ., Tallahassee, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012704; DMR-1157490
OSTI ID:
1412711
Alternate ID(s):
OSTI ID: 1389124
Report Number(s):
BNL-114525-2017-JA; R&D Project: PM016; KC0201050; TRN: US1800328
Journal Information:
Physical Review B, Vol. 96, Issue 12; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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Cited By (5)

Strong and Tunable Electrical Anisotropy in Type‐II Weyl Semimetal Candidate WP 2 with Broken Inversion Symmetry journal September 2019
Galvanomagnetic properties of the putative type-II Dirac semimetal PtTe2 journal July 2018
Magneto-conductivity of tilted type-I Weyl semimetals with different types of impurities journal April 2019
Topology of triple-point metals journal July 2019
Galvanomagnetic properties of the putative type-II Dirac semimetal PtTe$_2$ text January 2018

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