Symmetries and Propagation of Surface Plasmon Polaritons in Axion Electrodynamics

@misc{peluso2026symmetries,
  title = {{Symmetries and Propagation of Surface Plasmon Polaritons in Axion Electrodynamics}},
  author = {Marco Peluso},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.38692},
  eprint = {2610.38692},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.38692},
}

TY  - UNPB
TI  - Symmetries and Propagation of Surface Plasmon Polaritons in Axion Electrodynamics
AU  - Marco Peluso
PY  - 2026
DA  - 2026/10/28
PB  - arXiv
DO  - 10.48550/arxiv.2610.38692
UR  - https://arxiv.org/abs/2610.38692
AB  - Surface plasmon polaritons at the interface between a conductor governed by axion electrodynamics and an ordinary dielectric are studied using a general phenomenological model, in which the macroscopic response is described by an axial vector $ \mathbf{G} $, responsible for the anomalous Hall effect, and a pseudoscalar $ W $, accounting for the chiral magnetic effect. We extend the analysis of the chiral magnetic effect in the planar geometry, address its role in the cylindrical one and, in both geometries, discuss the case in which the two effects coexist. We find an upper bound on $ W $, a nonreciprocity requiring both effects and the absence of freely propagating modes, depending on the orientation of $ \mathbf{G} $, for the planar interface, and, for the cylindrical one, a novel coupling between the linear and orbital angular momenta of the modes, which already arises from the chiral magnetic effect alone and persists when the anomalous Hall effect is also present. The exact eigenmodes of the axion medium are derived, and the symmetries and propagation features of the surface modes are made explicit by analytical and asymptotic evaluation of the dispersion relations.
ER  -