Fig. 1

Formation of Weyl orbits and new 2D Fermi surface in Cd₃As₂ nanoplates. a Illustration of Weyl orbits in Cd₃As₂ with the magnetic field perpendicular to the sample surface. Each set of Weyl orbit consists of two half cyclotron processes in the momentum space of the top and bottom surfaces and a real-space propagation between surfaces. The two ends of Fermi arcs connect bulk Weyl node pairs with the opposite chirality (red and blue). b Illustration of Fermi surface when the Fermi energy is not at Dirac points (left) and the geometry of magnetotransport measurement setup (right). The two Fermi surfaces are connected by the two Fermi arcs. θ is defined as the angle between magnetic field and the normal direction of the sample surface. c, d Comparisons of MR in Cd₃As₂ nanoplate (sample #1, c) and Cd₃As₂ bulk crystals d, respectively. The insets in c and d are the extracted oscillations in sample #1 and Cd₃As₂ bulk crystals, respectively. e, f Comparisons of the FFT spectra of quantum oscillations in sample #1 e and Cd₃As₂ bulk crystals f, respectively. The insets in e and f are the angle dependence of oscillation frequency in sample #1 and bulk Cd₃As₂ crystals, respectively