Speaker
Dr
dominique Geffroy
(Masaryk University, Brno.)
Description
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.
Primary authors
Dr
dominique Geffroy
(Masaryk University, Brno.)
Mr
Abdulgazi Niyazi
(Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria)
Dr
Jan Kuneš
(Institute of Solid State Physics, TU Wien, 1040 Vienna, Austria)
