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

Abstract

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.

Authors:
 [1];  [2];  [1];  [3];  [4];  [5];  [3]
+ Show Author Affiliations
  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
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1412711
Alternate Identifier(s):
OSTI ID: 1389124
Report Number(s):
BNL-114525-2017-JA
Journal ID: ISSN 2469-9950; R&D Project: PM016; KC0201050; TRN: US1800328
Grant/Contract Number:  
SC0012704; DMR-1157490
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; magnetoresistance; magnetotransport; semimetals; topological materials; condensed matter & materials physics

Citation Formats

Wang, Aifeng, Graf, D., Liu, Yu, Du, Qianheng, Zheng, Jiabao, Lei, Hechang, and Petrovic, C. Large magnetoresistance in the type-II Weyl semimetal WP2. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.121107.
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Wang, Aifeng, Graf, D., Liu, Yu, Du, Qianheng, Zheng, Jiabao, Lei, Hechang, & Petrovic, C. Large magnetoresistance in the type-II Weyl semimetal WP2. United States. https://doi.org/10.1103/PhysRevB.96.121107
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Wang, Aifeng, Graf, D., Liu, Yu, Du, Qianheng, Zheng, Jiabao, Lei, Hechang, and Petrovic, C. Mon . "Large magnetoresistance in the type-II Weyl semimetal WP2". United States. https://doi.org/10.1103/PhysRevB.96.121107. https://www.osti.gov/servlets/purl/1412711.
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@article{osti_1412711,
title = {Large magnetoresistance in the type-II Weyl semimetal WP2},
author = {Wang, Aifeng and Graf, D. and Liu, Yu and Du, Qianheng and Zheng, Jiabao and Lei, Hechang and Petrovic, C.},
abstractNote = {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.},
doi = {10.1103/PhysRevB.96.121107},
journal = {Physical Review B},
number = 12,
volume = 96,
place = {United States},
year = {Mon Sep 11 00:00:00 EDT 2017},
month = {Mon Sep 11 00:00:00 EDT 2017}
}
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https://doi.org/10.1103/PhysRevB.96.121107
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    Works referencing / citing this record:

    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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