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http://hdl.handle.net/1843/55461| Type: | Artigo de Periódico |
| Title: | Topological magnons on the checkerboard lattice |
| Authors: | Antônio Sérgio Teixeira Pires |
| Abstract: | 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. |
| Subject: | Isoladores topológicos |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.physb.2020.412490 |
| URI: | http://hdl.handle.net/1843/55461 |
| Issue Date: | 2021 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0921452620304907 |
| metadata.dc.relation.ispartof: | Physica B: Condensed Matter |
| Appears in Collections: | Artigo de Periódico |
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