Detecting Gapless Excitations above Ferromagnetic Domain Walls

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dc.creatorKoma, Tohru
dc.creatorYamanaka, Masanori
dc.date2000-07-06
dc.date.accessioned2026-07-07T02:38:08Z
dc.date.available2026-07-07T02:38:08Z
dc.descriptionIn a two or three dimensional ferromagnetic XXZ model, a low energy excitation mode above a magnetic domain wall is gapless, whereas all of the usual spin wave excitations moving around the whole crystal are gapful. Although this surprising fact was already proved in a mathematically rigorous manner, the gapless excitations have not yet been detected experimentally. For this issue, we show theoretically that the gapless excitations appear as the dynamical fluctuations of the experimental observable, magnetoresistance, in a ferromagnetic wire. We also discuss other methods (e.g., ferromagnetic resonance and neutron scattering) to detect the gapless excitations experimentally.
dc.description5 pages, 2 figures, revtex
dc.identifierhttps://arxiv.org/abs/cond-mat/0007099
dc.identifierhttp://arxiv.org/abs/cond-mat/0007099
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/16559
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStatistical Mechanics
dc.subjectStrongly Correlated Electrons
dc.titleDetecting Gapless Excitations above Ferromagnetic Domain Walls
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