We present a nonlinear field theory of a three-sublattice hexagonal antiferromagnet. The order parameter is the spin frame, an orthogonal triplet of vectors related to sublattice magnetizations and spin chirality. The exchange energy, quadratic in spin-frame gradients, has three coupling constants, only two of which manifest themselves in the bulk. As a result, the three spin-wave velocities satisfy a universal relation. Vortices generally have an elliptical shape with the eccentricity determined by the Lamé parameters.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.132.096703 | DOI Listing |
Publication Analysis
Top Keywords
field theory
8
theory three-sublattice
8
spin-frame field
4
three-sublattice antiferromagnet
4
antiferromagnet nonlinear
4
nonlinear field
4
three-sublattice hexagonal
4
hexagonal antiferromagnet
4
antiferromagnet order
4
order parameter
4
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!