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Title: Fermi surface of the Weyl type-II metallic candidate WP 2

Abstract

Weyl type-II fermions are massless quasiparticles that obey the Weyl equation and which are predicted to occur at the boundary between electron- and hole-pockets in certain semi-metals, i.e. the (W,Mo)(Te,P)$$_2$$ compounds. Here, we present a study of the Fermi-surface of WP$$_2$$ \emph{via} the Shubnikov-de Haas (SdH) effect. Compared to other semi-metals WP$$_2$$ exhibits a very low residual resistivity, i.e. $$\rho_0 \simeq 10$$ n$$\Omega$$cm, which leads to perhaps the largest non-saturating magneto-resistivity $$(\rho(H))$$ reported for any compound. For the samples displaying the smallest $$\rho_0$$, $$\rho(H)$$ is observed to increase by a factor of $$2.5 \times 10^{7}$$ $$\%$$ under $$\mu_{0}H = 35$$ T at $T = 0.35$ K. The angular dependence of the SdH frequencies is found to be in excellent agreement with the first-principle calculations when the electron- and hole-bands are shifted by 30 meV with respect to the Fermi level. This small discrepancy could have implications for the predicted topological character of this compound.

Authors:
 [1];  [2];  [1];  [1];  [1];  [3];  [4];  [4];  [2];  [1]
  1. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
  2. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
  3. Univ. of Texas at Dallas, Richardson, TX (United States). Dept. of Chemistry and Biochemistry
  4. Univ. of Texas at Dallas, Richardson, TX (United States). Dept. of Chemistry and Biochemistry
Publication Date:
Research Org.:
Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
OSTI Identifier:
1399696
Alternate Identifier(s):
OSTI ID: 1389122
Grant/Contract Number:  
SC0002613; DMR-1157490
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 12; Related Information: https://journals.aps.org/prb/supplemental/10.1103/PhysRevB.96.121108; 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; Weyl semi-metals; magnetoresistivity; Hall-effect

Citation Formats

Schönemann, R., Aryal, N., Zhou, Q., Chiu, Y. -C., Chen, K. -W., Martin, T. J., McCandless, G. T., Chan, J. Y., Manousakis, E., and Balicas, L. Fermi surface of the Weyl type-II metallic candidate WP2. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.121108.
Schönemann, R., Aryal, N., Zhou, Q., Chiu, Y. -C., Chen, K. -W., Martin, T. J., McCandless, G. T., Chan, J. Y., Manousakis, E., & Balicas, L. Fermi surface of the Weyl type-II metallic candidate WP2. United States. doi:10.1103/PhysRevB.96.121108.
Schönemann, R., Aryal, N., Zhou, Q., Chiu, Y. -C., Chen, K. -W., Martin, T. J., McCandless, G. T., Chan, J. Y., Manousakis, E., and Balicas, L. Mon . "Fermi surface of the Weyl type-II metallic candidate WP2". United States. doi:10.1103/PhysRevB.96.121108. https://www.osti.gov/servlets/purl/1399696.
@article{osti_1399696,
title = {Fermi surface of the Weyl type-II metallic candidate WP2},
author = {Schönemann, R. and Aryal, N. and Zhou, Q. and Chiu, Y. -C. and Chen, K. -W. and Martin, T. J. and McCandless, G. T. and Chan, J. Y. and Manousakis, E. and Balicas, L.},
abstractNote = {Weyl type-II fermions are massless quasiparticles that obey the Weyl equation and which are predicted to occur at the boundary between electron- and hole-pockets in certain semi-metals, i.e. the (W,Mo)(Te,P)$_2$ compounds. Here, we present a study of the Fermi-surface of WP$_2$ \emph{via} the Shubnikov-de Haas (SdH) effect. Compared to other semi-metals WP$_2$ exhibits a very low residual resistivity, i.e. $\rho_0 \simeq 10$ n$\Omega$cm, which leads to perhaps the largest non-saturating magneto-resistivity $(\rho(H))$ reported for any compound. For the samples displaying the smallest $\rho_0$, $\rho(H)$ is observed to increase by a factor of $2.5 \times 10^{7}$ $\%$ under $\mu_{0}H = 35$ T at $T = 0.35$ K. The angular dependence of the SdH frequencies is found to be in excellent agreement with the first-principle calculations when the electron- and hole-bands are shifted by 30 meV with respect to the Fermi level. This small discrepancy could have implications for the predicted topological character of this compound.},
doi = {10.1103/PhysRevB.96.121108},
journal = {Physical Review B},
number = 12,
volume = 96,
place = {United States},
year = {2017},
month = {9}
}

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    Strong and Tunable Electrical Anisotropy in Type‐II Weyl Semimetal Candidate WP 2 with Broken Inversion Symmetry
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    Departure from the Wiedemann–Franz law in WP2 driven by mismatch in T-square resistivity prefactors
    journal, December 2018

    • Jaoui, Alexandre; Fauqué, Benoît; Rischau, Carl Willem
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