Topological spin waves in the atomic-scale magnetic skyrmion crystal
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Título: | Topological spin waves in the atomic-scale magnetic skyrmion crystal |
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Autor/es: | Roldán-Molina, A. | Núñez, A.S. | Fernández-Rossier, Joaquín |
Grupo/s de investigación o GITE: | Grupo de Nanofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física Aplicada |
Palabras clave: | Topological magnonics | Skyrmion lattice | Spin waves |
Área/s de conocimiento: | Física de la Materia Condensada |
Fecha de publicación: | 19-abr-2016 |
Editor: | IOP Publishing | Deutsche Physikalische Gesellschaft |
Cita bibliográfica: | New Journal of Physics. 2016, 18: 045015. doi:10.1088/1367-2630/18/4/045015 |
Resumen: | We study the spin waves of the triangular skyrmion crystal that emerges in a two-dimensional spin lattice model as a result of the competition between Heisenberg exchange, Dzyalonshinkii–Moriya interactions, Zeeman coupling and uniaxial anisotropy. The calculated spin wave bands have a finite Berry curvature that, in some cases, leads to non-zero Chern numbers, making this system topologically distinct from conventional magnonic systems. We compute the edge spin-waves, expected from the bulk-boundary correspondence principle, and show that they are chiral, which makes them immune to elastic backscattering. Our results illustrate how topological phases can occur in self-generated emergent superlattices at the mesoscale. |
Patrocinador/es: | The authors would like to thank funding from grants Fondecyt 1150072, ICM P10-061-F by Fondo de Innovación para la Competitividad-MINECON and Anillo ACT 1117. ASN also acknowledges support from Financiamiento Basal para Centros Científicos y Tecnológicos de Excelencia, under Project No. FB 0807(Chile). |
URI: | http://hdl.handle.net/10045/55883 |
ISSN: | 1367-2630 |
DOI: | 10.1088/1367-2630/18/4/045015 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1088/1367-2630/18/4/045015 |
Aparece en las colecciones: | INV - Grupo de Nanofísica - Artículos de Revistas |
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