title: Curvature-Induced Asymmetric Spin-Wave Dispersion.
abstract: In magnonics, spin waves are conceived of as electron-charge-free information carriers. Their wave behavior has established them as the key elements to achieve low power consumption, fast operative rates, and good packaging in magnon-based computational technologies. Hence, knowing alternative ways that reveal certain properties of their undulatory motion is an important task. Here, we show using micromagnetic simulations and analytical calculations that spin-wave propagation in ferromagnetic nanotubes is fundamentally different than in thin films. The dispersion relation is asymmetric regarding the sign of the wave vector. It is a purely curvature-induced effect and its fundamental origin is identified to be the classical dipole-dipole interaction. The analytical expression of the dispersion relation has the same mathematical form as in thin films with the Dzyalonshiinsky-Moriya interaction. Therefore, this curvature-induced effect can be seen as a "dipole-induced Dzyalonshiinsky-Moriya-like" effect.
authors.affiliation: Departamento de Física, Universidad Técnica Federico Santa María, Avenida España 1680, Casilla 110-V, Valparaíso, Chile and Departamento de Física, CEDENNA, Universidad Santiago de Chile, USACH, 9170124 Santiago, Chile.
authors.forename: Jorge A
authors.initials: JA
authors.lastname: Otálora
authors.affiliation: Department of Physics, Shanghai University, 99 Shangda Road, BaoShan District, Shanghai 200444, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Yan
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328 Dresden, Germany and Technische Universität Dresden, D-01062 Dresden, Germany.
authors.forename: Helmut
authors.initials: H
authors.lastname: Schultheiss
authors.affiliation: Karlsuhe Institute of Technology, Physikalisches Institut, Wolfgang-Gaede-Str. 1, D-76131 Karlsruhe, Germany and Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, CNRS, and Université de Strasbourg, 23 rue du Loess, F-67300 Strasbourg, France.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Hertel
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328 Dresden, Germany.
authors.forename: Attila
authors.initials: A
authors.lastname: Kákay