A dynamical mean-field theory study of Nagaoka ferromagnetism


We revisit Nagaoka ferromagnetism in the two-dimensional U = ∞ Hubbard model using the dynamical mean-field theory (DMFT). A recently developed continuous time quantum Monte Carlo method is applied to solve the DMFT impurity problem. The stability of Nagaoka ferromagnetism is studied as a function of both the nearest-neighbor lattice hopping t and the next… (More)


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