Fermi surface of the Weyl type-II metallic candidate WP2

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 very good agreement with the first-principle calculations when the electron- and hole-bands are slightly shifted with respect to the Fermi level, thus supporting the existence of underlying Weyl type-II points in WP${}_2$.

6 pages, 4 figures, supplementary information not included

References in corpus (6)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Titanic Magnetoresistance in WTe2
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Topological response in Weyl semimetals and the chiral anomaly
• Chiral anomaly and transport in Weyl metals
• Large magnetoresistance in type-II Weyl semimetal WP${}_2$

Cited by in corpus (9)

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• Magnetotransport properties of MoP${}_2$
• Record-high Mobility and Extreme Magnetoresistance on Kagome-lattice in Compensated Semimetal Ni3In2S2
• Sondheimer oscillations as a probe of non-ohmic flow in type-II Weyl semimetal WP${}_2$
• Strong and Tunable Electrical-Anisotropy in Type-II Weyl Semimetal Candidate WP2 with Broken Inversion Symmetry
• Anisotropic positive linear and sub-linear magnetoresistivity in the cubic type-II Dirac metal Pd${}_3$In${}_7$
• Electronic thermal resistivity and quasi-particle collision cross-section in semi-metals
• SrPd, a candidate material with extremely large magnetoresistance