Quantum Oscillations in Weyl and Dirac Semimetal Ultra-Thin Films

Abstract

We show that a thin film of Weyl or Dirac semimetal with a strong in-plane magnetic field becomes a novel two-dimensional Fermi liquid with interesting properties. The Fermi surface in this system is strongly anisotropic, which originates from a combination of chiral bulk channels and the Fermi arcs. The area enclosed by the Fermi surface depends strongly on the in-plane magnetic field component parallel to the Weyl/Dirac node splitting, which leads to unusual behavior in quantum oscillations when the magnetic field is tilted out of the plane. We estimate the oscillation frequencies and the regimes where such effects could be seen in Cd${}_3$As${}_2$, Na${}_3$Bi, and TaAs.

4.5 pages, 4 figures and 2 pages of appendix with 2 figures

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• Topological Lifshitz Transitions and Fermi Arc Manipulation in Weyl Semimetal NbAs
• Response Properties of Axion Insulators and Weyl Semimetals Driven by Screw Dislocations and Dynamical Axion Strings
• Landau levels, Bardeen polynomials and Fermi arcs in Weyl semimetals: the who's who of the chiral anomaly
• Three-dimensional Chiral Lattice Fermion in Floquet Systems
• Twisted Fermi surface of a thin-film Weyl semimetal
• Progress in epitaxial thin-film Na3Bi as a topological electronic material
• Magnetotransport in the Weyl semimetal in the quantum limit - the role of the topological surface states
• Chern numbers and chiral anomalies in Weyl butterflies
• Strongly angle-dependent magnetoresistance in Weyl semimetals with long-range disorder
• Magnetotransport in Weyl semimetal nanowires
• Surface and bulk Landau levels in thin films of Weyl semimetals
• Dirac semimetal thin films in in-plane magnetic fields
• Quantum description of Fermi arcs in Weyl semimetals in a magnetic field
• Hydrodynamic description of Weyl fermions in condensed state of matter