Nodal-line semimetals from Weyl superlattices

Abstract

The existence and topological classification of lower-dimensional Fermi surfaces is often tied to the crystal symmetries of the underlying lattice systems. Artificially engineered lattices, such as heterostructures and other superlattices, provide promising avenues to realize desired crystal symmetries that protect lower-dimensional Fermi surface, such as nodal lines. In this work, we investigate a Weyl semimetal subjected to spatially periodic onsite potential, giving rise to several phases, including a nodal-line semimetal phase. In contrast to proposals that purely focus on lattice symmetries, the emergence of the nodal line in this setup does not require small spin-orbit coupling, but rather relies on its presence. We show that the stability of the nodal line is understood from reflection symmetry and a combination of a fractional lattice translation and charge-conjugation symmetry. Depending on the choice of parameters, this model exhibits drumhead surface states that are exponentially localized at the surface, or weakly localized surface states that decay into the bulk at all energies.

11 pages, 8 figures, Editors' Suggestion

References in corpus (13)

• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Topological Node-Line Semimetal in Three Dimensional Graphene Networks
• Classification of reflection symmetry protected topological semimetals and nodal superconductors
• Potential ring of Dirac nodes in a new polymorph of Ca${}_3$P${}_2$
• Line of Dirac Nodes in Hyper-Honeycomb Lattices
• Topological Nodal Line Semimetals in CaP3 family of materials
• Bulk-boundary correspondence from the inter-cellular Zak phase
• Tunable Line Node Semimetals
• Topological semimetals and topological insulators in rare earth monopnictides
• Transport and optics at the node in a nodal loop semimetal
• Low Carrier Density Metal Realized in Candidate Line-Node Dirac Semimetals CaAgP and CaAgAs
• Magnetic susceptibility of topological nodal semimetals
• Observation of Effective Pseudospin Scattering in ZrSiS

Cited by in corpus (7)

• Floquet-engineering of nodal rings and nodal spheres and their characterization using the quantum metric
• Nano-mosaic of Topological Dirac States on the Surface of Pb5Bi24Se41 Observed by Nano-ARPES
• Unusual phase transition of layer-stacked borophene under pressure
• Quasiparticle Properties under Interactions in Weyl and Nodal Line Semimetals
• Collective modes in imbalanced nodal line semimetal
• Topological Fermi-arc-like surface states in Kramers nodal line metals
• Conductivity scaling and absence of localization in disordered nodal line semimetals