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The European Physical Journal Special Topics

, Volume 228, Issue 3, pp 643–657 | Cite as

Tuning nodal line semimetals in trilayered systems

  • Filomena ForteEmail author
  • Delia Guerra
  • Canio Noce
  • Wojciech Brzezicki
  • Mario Cuoco
Regular Article
  • 12 Downloads
Part of the following topical collections:
  1. Superconductivity and Functional Oxides

Abstract

We investigate two-dimensional trilayered quantum systems with multi-orbital conduction bands, by focusing on the role played by the layer degree of freedom in setting the character of nodal line semimetals. The layer index can label the electronic states where the electrons reside in the unit cell and can enforce symmetry constraints in the electronic structure by protecting bands crossing. We demonstrate that both the atomic spin–orbit coupling and the removal of local orbital degeneracy can lead to different types of electronic transitions with nodal lines that undergo a changeover from a loop structure enclosing the center of the Brillouin zone to pockets winding around multiple high symmetry points. We introduce and employ a criterion to find the nodal lines transitions. On the basis of a zero-dimensional topological invariant that, for a selected electronic and energy manifold, counts the number of bands below the Fermi level with a given layer inversion eigenvalue in high symmetry points of the Brillouin zone, one can determine the structure of the nodal loops and the ensuing topological transitions.

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Copyright information

© EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Filomena Forte
    • 1
    • 2
    Email author
  • Delia Guerra
    • 2
  • Canio Noce
    • 1
    • 2
  • Wojciech Brzezicki
    • 3
  • Mario Cuoco
    • 1
    • 2
  1. 1.CNR-SPIN, UOS di SalernoFisciano (SA)Italy
  2. 2.Dipartimento di Fisica “E.R. Caianiello”, Università degli Studi di SalernoFisciano (SA)Italy
  3. 3.International Research Centre MagTop at Institute of Physics, Polish Academy of SciencesWarsawPoland

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