Weyl nodal surfaces

Oğuz Türker and Sergej Moroz
Phys. Rev. B 97, 075120 – Published 12 February 2018

Abstract

We consider three-dimensional fermionic band theories that exhibit Weyl nodal surfaces defined as two-band degeneracies that form closed surfaces in the Brillouin zone. We demonstrate that topology ensures robustness of these objects under small perturbations of a Hamiltonian. This topological robustness is illustrated in several four-band models that exhibit nodal surfaces protected by unitary or antiunitary symmetries. Surface states and Nielsen-Ninomiya doubling of nodal surfaces are also investigated.

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  • Received 2 November 2017

DOI:https://doi.org/10.1103/PhysRevB.97.075120

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Oğuz Türker* and Sergej Moroz

  • Department of Physics, Technical University of Munich, 85748 Garching, Germany

  • *oguz.tuerker@tu-dresden.de
  • sergej.moroz@tum.de

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Issue

Vol. 97, Iss. 7 — 15 February 2018

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