Antiferromagnetic magnons and local anisotropy: Dynamical mean-field study

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...

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Bibliographic Details
Published in:Physical review. B 2021-08, Vol.104 (7), Article 075152
Main Authors: Niyazi, A., Geffroy, D., Kuneš, J.
Format: Article
Language:English
Subjects:
Anisotropy
Antiferromagnetism
Cubic lattice
Electrons
Field study
Magnons
Spin-orbit interactions
Symmetry
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Summary: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.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.104.075152