Fermi surface of the Weyl type-II metallic candidate
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:
-
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab); Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
- Univ. of Texas at Dallas, Richardson, TX (United States). Dept. of Chemistry and Biochemistry
- 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. https://doi.org/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. https://doi.org/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 = {Mon Sep 11 00:00:00 EDT 2017},
month = {Mon Sep 11 00:00:00 EDT 2017}
}
Web of Science
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