Fermi surface of the Weyl type-II metallic candidate
- 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
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.
- Research Organization:
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- SC0002613; DMR-1157490
- OSTI ID:
- 1399696
- Alternate ID(s):
- OSTI ID: 1389122
- Journal Information:
- Physical Review B, Vol. 96, Issue 12; Related Information: https://journals.aps.org/prb/supplemental/10.1103/PhysRevB.96.121108; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Large magnetoresistance in the type-II Weyl semimetal
Stable Weyl points, trivial surface states, and particle-hole compensation in