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Quantum oscillations in nodal line systems

MPG-Autoren
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Moessner,  Roderich
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Zitation

Yang, H., Moessner, R., & Lim, L.-K. (2018). Quantum oscillations in nodal line systems. Physical Review B, 97(16): 165118. doi:10.1103/PhysRevB.97.165118.


Zitierlink: http://hdl.handle.net/21.11116/0000-0001-3DE9-5
Zusammenfassung
We study signatures of magnetic quantum oscillations in three-dimensional nodal line semimetals at zero temperature. The extended nature of the degenerate bands can result in a Fermi surface geometry with topological genus one, as well as a Fermi surface of electron and hole pockets encapsulating the nodal line. Moreover, the underlying two-band model to describe a nodal line is not unique, in that there are two classes of Hamiltonian with distinct band topology giving rise to the same Fermi-surface geometry. After identifying the extremal cyclotron orbits in various magnetic field directions, we study their concomitant Landau levels and resulting quantum oscillation signatures. By Landau-fan-diagram analyses, we extract the nontrivial pi Berry phase signature for extremal orbits linking the nodal line.