Edge-Plasmon-Induced Magnetization in Higher Chern Insulators
Abstract
Higher Chern insulators host multiple dissipationless chiral edge states, one per unit of Chern number. We study the collective plasmon modes of these edge states at a domain wall between Chern numbers ๐ and โ๐, using a semiclassical model with Coulomb interactions. The plasmon dispersion is linear at long wavelengths, with a velocity that increases linearly with ๐. As in conventional two-dimensional metals, the edge plasmon generates an elliptically polarized electric field that decays into the bulk and drives electrons in circular orbits, producing a static orbital magnetization (inverse Faraday effect). For topological edge plasmons, the magnetization has a nontrivial spatial profile set by two competing length scales: the finite extent of the edge states and the plasmon wavelength. At fixed edge-charge amplitude, it grows strongly with ๐. At the domain wall, it approaches a finite plateau at low frequency and decays as 1/ฯ2 at high frequency. Its temperature dependence is nonmonotonic, with a maximum at an intermediate temperature. These results show how the Chern number controls plasmon-induced magnetization, in contrast to conventional edge plasmons.
Related
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BibTeX
@misc{poduval2026edgeplasmoninduced,
title = {{Edge-Plasmon-Induced Magnetization in Higher Chern Insulators}},
author = {Prathyush P. Poduval and Rofii and Muhammad S. Ukhtary and Thomas L. Schmidt and Eddwi H. Hasdeo},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.39555},
eprint = {2610.39555},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.39555},
}
RIS
TY - UNPB
TI - Edge-Plasmon-Induced Magnetization in Higher Chern Insulators
AU - Prathyush P. Poduval
AU - Rofii
AU - Muhammad S. Ukhtary
AU - Thomas L. Schmidt
AU - Eddwi H. Hasdeo
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.39555
UR - https://arxiv.org/abs/2610.39555
AB - Higher Chern insulators host multiple dissipationless chiral edge states, one per unit of Chern number. We study the collective plasmon modes of these edge states at a domain wall between Chern numbers ๐ and โ๐, using a semiclassical model with Coulomb interactions. The plasmon dispersion is linear at long wavelengths, with a velocity that increases linearly with ๐. As in conventional two-dimensional metals, the edge plasmon generates an elliptically polarized electric field that decays into the bulk and drives electrons in circular orbits, producing a static orbital magnetization (inverse Faraday effect). For topological edge plasmons, the magnetization has a nontrivial spatial profile set by two competing length scales: the finite extent of the edge states and the plasmon wavelength. At fixed edge-charge amplitude, it grows strongly with ๐. At the domain wall, it approaches a finite plateau at low frequency and decays as 1/ฯ^2 at high frequency. Its temperature dependence is nonmonotonic, with a maximum at an intermediate temperature. These results show how the Chern number controls plasmon-induced magnetization, in contrast to conventional edge plasmons.
ER -