Phase diagrams of SO($N$) Majorana-Hubbard models: Dimerization, internal symmetry breaking, and fluctuation-induced first-order transitions
Lukas Janssen,
Urban F. P. Seifert
Abstract:We study the zero-temperature phase diagrams of Majorana-Hubbard models with SO(π) symmetry on twodimensional honeycomb and π-flux square lattices, using mean-field and renormalization group approaches. The models can be understood as real counterparts of the SU(π) Hubbard-Heisenberg models, and may be realized in Abrikosov vortex phases of topological superconductors, or in fractionalized phases of strongly-frustrated spin-orbital magnets. In the weakly-interacting limit, the models feature stable and full… Show more
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