Surface plasmon polaritons in strained Weyl semimetals

Abstract

Surface plasmon polaritons in a strained slab of a Weyl semimetal with broken time-reversal symmetry are investigated. It is found that the strain-induced axial gauge field reduces frequencies of these collective modes for intermediate values of the wave vector. Depending on the relative orientation of the separation of Weyl nodes in momentum space, the surface normal, and the direction of propagation, the dispersion relation of surface plasmon polaritons could be nonreciprocal even in a thin slab. In addition, strain-induced axial gauge fields can significantly affect the localization properties of the collective modes. These effects allow for an in situ control of the propagation of surface plasmon polaritons in Weyl semimetals and might be useful for creating nonreciprocal devices.

16 pages, 10 multi-panel figures; published version

References in corpus (16)

• Theory of surface plasmons and surface-plasmon polaritons
• Topological response in Weyl semimetals and the chiral anomaly
• Anomalous Hall Effect in Weyl Metals
• Discovery of Weyl fermion semimetals and topological Fermi arc states
• Consequences of a condensed matter realization of Lorentz violating QED in Weyl semi-metals
• Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd${}_2$As${}_2$
• Chiral anomaly from strain-induced gauge fields in Dirac and Weyl semimetals
• Observation of the quantum Hall effect in confined films of the three-dimensional Dirac semimetal Cd3As2
• Inhomogeneous Weyl and Dirac semimetals: Transport in axial magnetic fields and Fermi arc surface states from pseudo Landau levels
• Strain induced Chiral Magnetic Effect in Weyl semimetals
• Quantum oscillations without magnetic field
• Towards Weyltronics: Realization of epitaxial NbP and TaP Weyl Semimetal thin films
• Chiral asymmetry of the Fermi surface in dense relativistic matter in a magnetic field
• Optical properties and electromagnetic modes of Weyl semimetals
• Emergent gravity and chiral anomaly in Dirac semimetals in the presence of dislocations
• Hydrodynamics of Fermi arcs: Bulk flow and surface collective modes