Antiferromagnetic magnons and local anisotropy: Dynamical mean-field study
| Autoři | |
|---|---|
| Rok publikování | 2021 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Physical Review B |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://doi.org/10.1103/PhysRevB.104.075152 |
| Doi | http://dx.doi.org/10.1103/PhysRevB.104.075152 |
| Klíčová slova | Hubbard model; Spin dynamics; Antiferromagnets; Green's function methods; Magnetic order |
| Popis | We present a dynamical mean-field study of antiferromagnetic magnons in a one-, two-, and three-orbital Hubbard model of square and bcc cubic lattice at intermediate coupling strength. We investigate the effect of anisotropy introduced by an external magnetic field or single-ion anisotropy. For the latter we tune continuously between the easy-axis and easy-plane models. We also analyze a model with spin-orbit coupling in cubic site-symmetry setting. The ordered states as well as the magnetic excitations are sensitive to even a small breaking of SU(2) symmetry of the model and follow the expectations of spin-wave theory as well as general symmetry considerations. |
| Související projekty: |