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http://hdl.handle.net/1843/55461| Tipo: | Artigo de Periódico |
| Título: | Topological magnons on the checkerboard lattice |
| Autor(es): | Antônio Sérgio Teixeira Pires |
| Resumen: | Here we investigate topological magnon effects in a ferromagnetic checkerboard lattice, also known as planar pyrochlore, with a Dzyaloshinskii-Moriya interaction (DMI). The DMI breaks the time-reversal symmetry and leads to topological bands with nontrivial Chern numbers, which indicates the existence of edge state modes. We show that the model studied here can be treated as a two-band model, and we calculate the Berry curvature, the spin Hall conductivity, the spin Nernst coefficient, and the thermal Hall conductivity as a function of temperature. Measurements of these quantities can be used to detect finite Berry curvatures. We also analyze the effect of an applied magnetic field and take into account higher-order contributions responsible to anharmonic magnon effects. Our study complements others done in the honeycomb, kagome, Lieb, Shastry-Sutherland, and pyrochlore lattices. |
| Asunto: | Isoladores topológicos |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Institución: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE FÍSICA |
| Tipo de acceso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1016/j.physb.2020.412490 |
| URI: | http://hdl.handle.net/1843/55461 |
| Fecha del documento: | 2021 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0921452620304907 |
| metadata.dc.relation.ispartof: | Physica B: Condensed Matter |
| Aparece en las colecciones: | Artigo de Periódico |
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