Details

Autor(en) / Beteiligte

• Türker, Oğuz
• Moroz, Sergej

Titel

Weyl nodal surfaces

Ist Teil von

• Physical review. B, 2018-02, Vol.97 (7), Article 075120

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2018

Quelle

American Physical Society

Beschreibungen/Notizen

• 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.