Interplay between magnetism and topology in Kondo Insulators*

Topological Kondo insulators are a rare example of an interaction-enabled topological phase of matter, making them an intriguing but also hard case for theoretical studies.
Here, we investigate the periodic Anderson model with the addition of spin orbit coupling via a fully spin-rotation invariant slave-boson treatment. Within mean-field approximation we map out the magnetic phase diagram and characterize both antiferromagnetic and paramagnetic phases by their topological properties.
Moreover, we establish the stability of the mean-field solution via Gaussian fluctuations around the saddle point by the computation of the dynamical susceptibility.