Abstract
We study the orbital angular momentum of magnons for collinear ferromagnet (FM) and antiferromagnetic (AF) systems with nontrivial networks of exchange interactions. The orbital angular momentum of magnons for AF and FM zigzag and honeycomb lattices becomes nonzero when the lattice contains two inequivalent sites and is largest at the avoided-crossing points or extremum of the frequency bands. Hence, the arrangement of exchange interactions may play a more important role at producing the orbital angular momentum of magnons than the spin-orbit coupling energy and the resulting noncollinear arrangement of spins.
| Original language | English |
|---|---|
| Article number | 167202 |
| Journal | Physical Review Letters |
| Volume | 129 |
| Issue number | 16 |
| DOIs | |
| State | Published - Oct 14 2022 |
Funding
We acknowledge useful conversations with D. Xiao and R. deSousa. Research sponsored by the Laboratory Directors Fund of Oak Ridge National Laboratory. This Letter has been authored in part by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes.
| Funders | Funder number |
|---|---|
| U.S. Department of Energy | |
| Oak Ridge National Laboratory | DE-AC05-00OR22725 |