Chiral Tubular Magnonic Crystals with Periodic Dzyaloshinskii--Moriya Interaction
Abstract
We introduce a chiral tubular magnonic crystal formed by a ferromagnetic nanotube with a periodically modulated interfacial Dzyaloshinskii--Moriya interaction (DMI). Using a plane-wave formalism adapted to the cylindrical geometry, we calculate the spin-wave band structure including exchange, nonlocal dipolar coupling, and interfacial DMI. We show that the tubular geometry qualitatively modifies the role of periodic DMI compared with planar chiral magnonic crystals. Besides producing the usual nonreciprocal frequency shift, curvature converts part of the interfacial DMI into an effective anisotropy-like internal field. This creates a sign-dependent frequency landscape along the tube, so that DMI-covered regions can act either as potential wells or barriers for the lowest-frequency modes. As a result, flat and weakly dispersive bands appear in both Damon--Eshbach-like and backward-volume-like configurations, with the latter having no direct counterpart in planar systems. Our results identify periodically engineered DMI in nanotubes as a route for controlling nonreciprocal spin waves, localized modes, and flat magnonic bands in curved architectures.
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BibTeX
@misc{contrerasgallardo2026chiral,
title = {{Chiral Tubular Magnonic Crystals with Periodic Dzyaloshinskii--Moriya Interaction}},
author = {P. Contreras-Gallardo and J. Flores-Farias and B. Mimica-Figari and V. Puliafito and P. Landeros and R. A. Gallardo},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.28928},
eprint = {2608.28928},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.28928},
}
RIS
TY - UNPB
TI - Chiral Tubular Magnonic Crystals with Periodic Dzyaloshinskii--Moriya Interaction
AU - P. Contreras-Gallardo
AU - J. Flores-Farias
AU - B. Mimica-Figari
AU - V. Puliafito
AU - P. Landeros
AU - R. A. Gallardo
PY - 2026
DA - 2026/08/28
PB - arXiv
DO - 10.48550/arxiv.2608.28928
UR - https://arxiv.org/abs/2608.28928
AB - We introduce a chiral tubular magnonic crystal formed by a ferromagnetic nanotube with a periodically modulated interfacial Dzyaloshinskii--Moriya interaction (DMI). Using a plane-wave formalism adapted to the cylindrical geometry, we calculate the spin-wave band structure including exchange, nonlocal dipolar coupling, and interfacial DMI. We show that the tubular geometry qualitatively modifies the role of periodic DMI compared with planar chiral magnonic crystals. Besides producing the usual nonreciprocal frequency shift, curvature converts part of the interfacial DMI into an effective anisotropy-like internal field. This creates a sign-dependent frequency landscape along the tube, so that DMI-covered regions can act either as potential wells or barriers for the lowest-frequency modes. As a result, flat and weakly dispersive bands appear in both Damon--Eshbach-like and backward-volume-like configurations, with the latter having no direct counterpart in planar systems. Our results identify periodically engineered DMI in nanotubes as a route for controlling nonreciprocal spin waves, localized modes, and flat magnonic bands in curved architectures.
ER -