On generalized local symmetries of the SO(2,1) invariant non-linear sigma model

Derivation of the generalized non-linear

Derivation of the generalized non-linear sigma model in the presence of the Dzyaloshinskii–Moriya interaction

✍ L. Benfatto; M. Silva Neto; V. Juricic; C. Morais Smith 📂 Article 📅 2006 🏛 Elsevier Science 🌐 English ⚖ 105 KB

We derive the long-wavelength non-linear sigma model for a two-dimensional Heisenberg system in the presence of the Dzyaloshinskii-Moriya and pseudodipolar interactions. We show that the system is a non-conventional easy-axis antiferromagnet, displaying an anomalous coupling between the magnetic fie