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Topological magnonics in the two-dimensional van der Waals magnet CrI3
- Source :
- Phys. Rev. B 102, 024409 (2020)
- Publication Year :
- 2020
-
Abstract
- In this article, we calculate the magnon spectrum of Kitaev-Heisenberg magnets. This model has been recently proposed as a spin Hamiltonian to model $\text{CrI}_3$ and other two-dimensional magnets. It is a minimal spin Hamiltonian that includes a contribution stemming from a Heisenberg, isotropic exchange, and a contribution arising from a Kitaev interaction, anisotropic and frustrated exchange. Our calculations reveal the topological nature of the magnons and a gap that opens at the $K$ and $K^\prime$ points. These topological properties give rise to effects such as thermal Hall effect. In addition to the bulk properties, we calculate the magnon spectrum of nanoribbons illustrating the corresponding edge states.<br />Comment: 5 pages, 4 figures
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 102, 024409 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.2002.05266
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.102.024409