BESPALOV, A. A.; BUZDIN, Alexandre I.

doi:10.1103/PhysRevB.87.094509

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BESPALOV, A. A.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Institute for Physics of Microstructures of the RAS

BUZDIN, Alexandre I.
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Institut universitaire de France [IUF]

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Article de revue

Ce document a été publié dans

Physical Review B: Condensed Matter and Materials Physics (1998-2015). 2013, vol. 87, n° 9, p. 094509

American Physical Society

Résumé en anglais

Magnetic excitations in a ferromagnetic superconductor in the presence of an Abrikosov vortex lattice have been studied using the phenomenological London and Landau-Lifshitz equations. Due to the periodicity of the vortex field the magnon spectrum has a band structure, similar to the structure of the electon spectrum in a crystal lattice. The gaps between adjacent bands have been calculated using an analog of the weak-binding approximation. When the applied magnetic field is altered the band structure undergoes a qualitative transformation due to commensurability effects, connected with the nonmonotonicity of the magnon spectrum in the Meissner state. In dirty samples the energy gaps may be smeared out because of the dissipation connected with vortex motion. In sufficiently clean samples the gaps manifest themselves as maxima in the frequency dependence of the microwave reflectivity coefficient.< Réduire

Mots clés en anglais

Spin waves

Vortex phases

Phenomenological theories

DOI

http://dx.doi.org/10.1103/PhysRevB.87.094509

Projet Européen

New Century of Superconductivity: Ideas, Materials, Technologies

Project ANR

Etats de Majorana et d'Andreev dans des circuits hybrides combinant des matériaux magnétiques et supraconducteurs - ANR-12-BS04-0016

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Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798