Tailoring High-Frequency Magnonics in Monolayer Chromium Trihalides
| Autor: | Raí M Menezes, Denis Šabani, Cihan Bacaksiz, Clécio C de Souza Silva, Milorad V Milošević |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter::Materials Science
Condensed Matter - Materials Science Mechanics of Materials Physics Mechanical Engineering Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Materials Science Condensed Matter::Strongly Correlated Electrons General Chemistry Computational Physics (physics.comp-ph) Condensed Matter Physics Physics - Computational Physics |
| Zdroj: | 2D materials |
| ISSN: | 2053-1583 |
| Popis: | Monolayer chromium-trihalides, the archetypal two-dimensional (2D) magnetic materials, are readily suggested as a promising platform for high-frequency magnonics. Here we detail the spin-wave properties of monolayer CrBr3 and CrI3, using spin-dynamics simulations parametrized from the first principles. We reveal that spin-wave dispersion can be tuned in a broad range of frequencies by strain, paving the way towards flexo-magnonic applications. We further show that ever-present halide vacancies in these monolayers host sufficiently strong Dzyaloshinskii-Moriya interaction to scatter spin-waves, which promotes design of spin-wave guides by defect engineering. Finally we discuss the spectra of spin-waves propagating across a moiré-periodic modulation of magnetic parameters in a van der Waals heterobilayer, and show that the nanoscale moiré periodicities in such samples are ideal for realization of a magnonic crystal in the terahertz frequency range. Recalling the additional tunability of magnetic 2D materials by electronic gating, our results situate these systems among the front-runners for prospective high-frequency magnonic applications. |
| Databáze: | OpenAIRE |
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