High Bott Index and Magnon Transport in Multi-Band Systems
Published:Dec 30, 2025 12:37
•1 min read
•ArXiv
Analysis
This paper explores the topological properties and transport behavior of magnons (quasiparticles in magnetic systems) in a multi-band Kagome ferromagnetic model. It focuses on the bosonic Bott index, a real-space topological invariant, and its application to understanding the behavior of magnons. The research validates the use of Bott indices greater than 1, demonstrating their consistency with Chern numbers and bulk-boundary correspondence. The study also investigates how disorder and damping affect magnon transport, providing insights into the robustness of the Bott index and the transport of topological magnons.
Key Takeaways
- •Investigates the topology and transport of magnons in a multi-band Kagome ferromagnetic model.
- •Validates the use of bosonic Bott indices greater than 1.
- •Demonstrates the agreement with Chern numbers and bulk-boundary correspondence.
- •Studies the impact of disorder and damping on magnon transport.
- •Provides insights into the robustness of the Bott index and transport of topological magnons.
Reference
“The paper demonstrates the validity of the bosonic Bott indices of values larger than 1 in multi-band magnonic systems.”