Interaction-Stabilized Topological Magnon Insulator in Ferromagnets
Condensed matter systems admit topological collective excitations above a trivial ground state, an example being Chern insulators formed by Dirac bosons with a gap at finite energies. However, in contrast to electrons, there is no particle-number conservation law for collective excitations, which gi...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2021-06-01
|
| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.11.021061 |