@article{3059123,
    title = "Multiple Dirac nodes and symmetry protected Dirac nodal line in orthorhombic α-RhSi",
    author = "Mozaffari, S. and Aryal, N. and Schönemann, R. and Chen, K.-W. and Zheng, W. and McCandless, G.T. and Chan, J.Y. and Manousakis, E. and Balicas, L.",
    journal = "Physical Review B",
    year = "2020",
    volume = "102",
    number = "11",
    publisher = "American Physical Society",
    issn = "2469-9950, 2469-9969",
    doi = "10.1103/PhysRevB.102.115131",
    keywords = "Silicides;  Silicon;  Topology;  Transition metals, Crystalline symmetry;  De Haas-van Alphen effect;  Group representation;  Magnetic torques;  Symmetry analysis;  Topological excitations;  Topological features;  Transition metal silicides, Rhodium compounds",
    abstract = "Exotic multifold topological excitations have been predicted and were recently observed in transition metal silicides like β-RhSi. Herein, we report that interesting topological features of RhSi are also observed in its orthorhombic α phase, which displays multiple types of Dirac nodes very close to the Fermi level ÉF. We discuss the symmetry analysis, band connectivity along high-symmetry lines using group representations, band structure, the nature of the Dirac points and of a nodal line occurring near ÉF which is protected by the crystalline symmetry. The de Haas-van Alphen effect indicates a Fermi surface in agreement with the calculations. We find an elliptically shaped nodal line very close to ÉF around and near the S point on the ky-kz plane that results from the intersection of two upside-down Dirac cones. Both Dirac points of the participating Kramers degenerate bands are only 5 meV apart; hence, an accessible magnetic field might induce a crossing between the spin-up partner of the upper Dirac cone and the spin-down partner of the lower Dirac cone, possibly explaining the anomalies observed in the magnetic torque. α-RhSi is a unique system since all bands crossing ÉF emerge from Dirac nodes. © 2020 American Physical Society."
}